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AC Cobra

ac cobra, ac cobra for sale
The AC Cobra, sold as the Shelby Cobra in the United States of America, is an Anglo-American sports car with a Ford V8 engine, produced intermittently in both the UK and United States of America since 1962


  • 1 History and development
  • 2 AC Ace 36
  • 3 Production
  • 4 European model
  • 5 390 Big Block Cobra
  • 6 Cobra 427
  • 7 AC 289 Sports
  • 8 Packages
  • 9 Adaptations
  • 10 AutoKraft
  • 11 AC Car Group
  • 12 AC Motor Holdings Ltd
  • 13 Acedes Holdings Llc
  • 14 Shelby Daytona Coupé
  • 15 427 Super Coupes
  • 16 Counterfeit Cobras
  • 17 Continuation Cars
  • 18 See also
  • 19 References
    • 191 Notes
  • 20 External links

History and developmentedit

Like many British manufacturers, AC Cars had been using the Bristol straight-6 engine in its small-volume production, including its AC Ace two-seater roadster This had a hand-built body with a steel tube frame, and aluminium body panels that were made using English wheeling machines The engine was a pre-World War II design by BMW which by the 1960s was considered dated Bristol decided in 1961 to cease production of its engine and instead to use Chrysler 313 cu in 51 L V8 engines AC started using the 26 litre Ford Zephyr engine in its cars

In September 1961, American automotive designer Carroll Shelby wrote to AC asking if they would build him a car modified to accept a V8 engine AC agreed, provided a suitable engine could be found Shelby went to Chevrolet to see if they would provide him with engines, but not wanting to add competition to the Corvette they said no However, Ford wanted a car that could compete with the Corvette and they happened to have a brand new engine which could be used in this endeavor: the Windsor 221 in³ 36 L engine – a new lightweight, thin-wall cast small-block V8 Ford provided Shelby with two engines

AC Ace 36edit

In January 1962 mechanics at AC Cars in Thames Ditton, Surrey designed the "AC Ace 36" prototype with chassis number CSX2000

AC had already made most of the modifications needed for the small-block V8 when they installed the 26 litre inline 6 Ford Zephyr engine, including the extensive rework of the AC Ace's front end bodywork The only modification of the front end of the first Cobra from that of the "AC Ace 26" was the steering box, which had to be moved outward to clear the wider V8 engine

The most important modification was the fitting of a stronger rear differential to handle the increased engine power A Salisbury 4HU unit with inboard disc brakes to reduce unsprung weight was chosen instead of the old ENV unit It was the same unit used on the Jaguar E-Type After testing and modification, the engine and transmission were removed and the chassis was air-freighted to Shelby in Los Angeles on 2 February 1962,8 By this time the small-block's displacement was increased to 260 in3 43 L

Shelby's team paired this engine along with a transmission into CSX2000, in less than eight hours at Dean Moon's shop in Santa Fe Springs, California, and began road-testing9


CSX/CS 2001–2602

A few edits were made to the production version:

  • Inboard brakes were moved outboard to reduce cost
  • The fuel tank filler was relocated from the fender to the center of the trunk The trunk lid had to be shortened to accommodate this change

AC exported completed, painted, and trimmed cars less engine and gearbox to Shelby who then finished the cars in his workshop in Los Angeles by installing the engine and gearbox and correcting any bodywork flaws caused by the car's passage by sea A small number of cars were also completed on the East Coast of the USA by Ed Hugus in Pennsylvania, including the first production car; CSX2001

The first 75 Cobra Mk1 models including the prototype were fitted with the 260 cu in 43 L9 The remaining 51 Mk1 models were fitted with a larger version of the Windsor Ford engine, the 289 cu in 47 L V8

In late 1962 Alan Turner, AC's chief engineer completed a major design change of the car's front end to accommodate rack and pinion steering while still using transverse leaf spring suspension The new car entered production in early 1963 and was designated Mark II The steering rack was borrowed from the MGB while the new steering column came from the VW Beetle About 528 Mark II Cobras were produced in the summer of 1965 the last US-bound Mark II was produced in November 1964

European modeledit

COB/COX 6001–6062

In 1963 to keep production focused on producing cars for Shelby American Inc, the Ruddspeed Ace was discontinued To supply cars to the European market, AC began to market and sell the Cobra in Europe Advertisements from the time state that the Cobra was designed to meet the requirements of Shelby American Inc

390 Big Block Cobraedit

Shelby experimented with a larger Ford FE engine, of 390 cubic inches 64 L in chassis number CSX2196 Unfortunately the car was not able to receive the development it needed, as resources were aimed at taking the crown from Ferrari in the GT class Ken Miles drove and raced the FE-powered Mark II at Sebring and pronounced the car virtually undriveable, naming it "The Turd" It failed to finish with the engine expiring due to damper failure

CSX2196 was revised for the show down at Nassau which allowed a more relaxed class division of racing This allowed the GT cobras to run with prototype Ford GT, GM Grand Sport Corvettes and Lola Mk6 It was for this event in 1964 that the Fliptop cobra was used An aluminium 390 cubic inches 64 L engine was used However, the car failed to finish

Cobra 427edit

A new chassis was required, developed, and designated Mark III The new car was designed in cooperation with Ford in Detroit A new chassis was built using 4 in 102 mm main chassis tubes up from 3 in 76 mm and coil spring suspension all around The new car also had wide fenders and a larger radiator opening It was powered by the "side oiler" Ford 427 engine 70 L rated at 425 bhp 317 kW, which provided a top speed of 164 mph 262 km/h in the standard model and 485 bhp 362 kW with a top speed of 185 mph 298 km/h in the competition model


CSX/CSB 3001–3100

Cobra Mark III production began on 1 January 1965; two prototypes had been sent to the United States in October 1964 Cars were sent to the US as unpainted rolling chassis, and they were finished in Shelby's workshop

Unfortunately, The MK III missed homologation for the 1965 racing season and was not raced by the Shelby team Only 56 of the 100 planned cars were produced Of those, 31 unsold competition models were detuned and fitted with wind miscreens for street use Called S/C for semi-competition, an original example can currently sell for 15 million USD, making it one of the most valuable Cobra variants10


CSX/CSB 3101–3360

Some Cobra 427s were actually fitted with Ford's 428 cubic inches 701 L engine, a long stroke, smaller bore, lower cost engine, intended for road use rather than racing The AC Cobra was a financial failure that led Ford and Carroll Shelby to discontinue importing cars from England in 1967

AC 289 Sportsedit

COB/COX 6101–6132

AC Cars kept producing the coil-spring AC Roadster with narrow fenders and a small block Ford 289 Shelby had sold the COBRA name to Ford in 1965, so AC marketed the car as the AC 289 Sports It was built and sold in Europe until late 1969



Shelby offered a drag package, known as the Dragon Snake, which won several NHRA National events with Bruce Larson or Ed Hedrick at the wheel of CSX209311

Only Six 289 Dragon Snake Cobras were produced by the factory 2019, 2357 as factory team cars 2248, 2416, 2427, 2472 as private team cars

One 427 Dragon Snake, 3198

Cobras were also prepared by customers using the drag package Examples include: 2075, 2093, 2109, 2353, and 3159 "King Cobra"


Designed for auto-cross events, only two examples were produced Both had white exterior paint with red racing strings and red leather interiors

CSX2522 "Slalom Special"

CSX2537 "Slalom Snake"

Equipped almost identically to CSX2522, this second example had aluminum valve covers, a tuned air cleaner, a Smiths heater, seat belts, front and rear brake cooling ducts, a hood scoop, brake cooling scoops, side exhausts and a painted roll bar 2522’s roll bar was chromed Suspension options included Koni shock absorbers, front and rear anti-sway bars, unpolished six-inch magnesium pin-drive wheels, and Goodyear Blue Streak Sports Car Special tires


In 1966, CSX 3015 S/C was selected and converted into a special model called the Supersnake the "Cobra to End All Cobras" Originally part of a European promotional tour before its conversion This conversion called for making the original racing model street legal with mufflers, a windshield and bumpers amongst other modifications But some things were not modified, including the racing rear end, brakes and headers The most notable modification is the addition of Twin Paxton Superchargers, TPS

Shelby crafted a second model, CSX 3303, from a street version CSX 3303 was given to comedian Bill Cosby, his close friend When Cosby attempted to drive CSX3303, he found that it was very difficult to keep under control; he later recounted the experience on his 1968 stand-up comedy album 200 MPH Cosby gave the car back to Shelby, who then shipped it out to one of his company's dealers in San Francisco, S&C Ford on Van Ness Avenue S&C Ford then sold it to customer Tony Maxey Maxey, suffering the same issues as Cosby did with the car, had his throttle stick while leaving a traffic stop, lost control and drove it off a cliff, landing in the Pacific Ocean waters12

Shelby used his CSX 3015 as a personal car over the years, sometimes entering it into local races like the Turismos Visitadores Cannonball-Run race in Nevada, where he was "waking up whole towns, blowing out windows, throwing belts and catching fire a couple of times, but finishing"13 CSX3015 was auctioned on 22 January 2007, at the Barrett-Jackson Collector Car Event in Scottsdale, Arizona, for $5 million plus commission £28 million, a record for a vehicle made in the US1415


CF/CFX 01-80

AC also produced the AC 428 Frua on a stretched Cobra 427 MK III coil spring chassis The steel body was designed and built by Pietro Frua until 1973

EF/EFX 501–508

The American Electric Car Company used an even further modified chassis for their vehicles


CSX 5001–5002

One 96-inch prototype chassis CSX 3063 was shipped to GHIA in Italy in 1965 for a body styling exercise This vehicle was first displayed during a European car show with a Cobra license tag An article about the car was written up in the Winter 65/66 edition of "Style Quarterly" magazine Shelby American internal production records show that the car was shipped to Shelby American for Evaluation and review AC Cars Ltd internal production records show that Shelby American placed an order for two 96-inch chassis CSX 5001–5002 in 1966 AC labeled these chassis as "GHIA CONVERTIBLE" in their factory ledger


CSX 3001

Shelby American internal production records show that the car was shipped to Shelby American for evaluation and review in early 1966 The vehicle was returned to Ford and now resides in the Detroit Historical Museum


By 1982, the Ac name was licensed by Autokraft, a Cobra parts reseller and replica car manufacturing company owned by Brian A Angliss Autokraft also had acquired the company's tooling

Autokraft manufactured an AC 289 continuation car called the Autokraft Mk IV, basically a Mk III with a 302 cubic inches 495 L Ford V8 and Borg Warner T5 Transmission The Mk IV also received an independent suspension

In 1986, Autokraft as a joint venture with Ford joining in 1987 purchased AC Cars, and produced the AC Mk IV Cobra, with a 250 hp 186 kW at 4,200 rpm, 4,942 cc Ford V8, which provided a top speed of 215 km/h 134 mph and 0–100 km/h in 52 seconds

At the 1990 Geneva Salon the Lightweight version was presented: weight was down to 1,070 kg 2,360 lb compared to 1,190 kg or 2,620 lb and power was up to 370 hp 276 kW at 5,750 rpm thanks to alloy heads, a Holley four-barrel carburettor, and no catalytic converter18 While the Lightweight did not meet US federal regulations, the Mk IV did, and 480 cars of all versions were built until 1996

AC Car Groupedit

In 1996 the company was purchased by Pride Automotive Two new 'Cobra' style cars were launched in 1997, the 'Superblower', an aluminium-bodied car with a supercharged 4,942cc Ford V8 providing 320 bhp and the cheaper 'Carbon Road Series' CRS with a carbonfibre body and a 225 bhp version of the Ford V8 engine 22 Superblowers and 37 CRSs were built between 1997 and 2001

In 1999, a limited edition run of 25 289 FIA Cobras were planned Only 1 example was manufacturered, chassis number COB 1001

A further variant, 'the 212 S/C' with a 3506 cc 350 hp twin-turbocharged Lotus V8 engine was introduced in 2000, but only two examples were built

In 2001, the company relocated its factory to Frimley, Surrey By August 2002, the company was in a financial low and briefly acquired by Private Corp, who closed operations in October 2003 Only two models were produced, a FIA 289 COX 2610, and a 427 Cobra COX 3361 The cars were intended to be sold in the USA market, through a new company, AC Cars USA, located in Florida Both cars were numbered following where the original ledger entries left off during the 1960s

AC Motor Holdings Ltdedit

On July 8, 2002, a new company was formed in Malta named AC Motor Holdings and was responsible for the branding of the company

In late 2003, the Frimley factory was under the control of AC Motor Holdings

On December 4, 2003, Shelby and AC announced a co-production of the CSX1000 and CSX 7500 series Only 14 CSX1000, and 2 CSX 7500 cars were built by 2007

Between 2004 and 2007, AC Motor Holdings produced the AC Mk V in their Malta factory However, only 3 right-hand drive and 2 left-hand drive carbon-fibre AC Mk Vs powered by 340 bhp 5-litre Ford V8 engines were built before the Maltese operation closed

Acedes Holdings Llcedit

On April 20, 2008, AC announced its Heritage Series, the UK operations were granted to Brooklands Motor Company, dba AC Heritage The USA operations were granted to AC AutoKraft, Llc, located in Michigan

Both companies are licensed to produce traditional Aluminum body models: Ruddspeed, 289, and 427 continuation Aces and Cobras

In 2009, AC has licensed Gullwing GmbH in Germany, dba AC-Automotive, to produce the AC MK VI, with an aluminium coated composite body and powered by a 62 litre 440 hp LS3 Chevrolet engine, or a 550 hp supercharged version

In 2012, the AC Mrk II Classic was released Available in either aluminum or fiberglass bodies

In 2017, the AC Mrk1 260 Legacy edition was released in a limited production of nine cars Also released was the AC 378 a newer composite body version of the Cobra

Shelby Daytona Coupéedit

Main article: Shelby Daytona 1964 Shelby Daytona Cobra Coupe CSX2299

In an effort to improve top speed along the legendary Mulsanne Straight at the 24 Hours of Le Mans race, a number of enclosed, coupe variations were constructed using the leafspring chassis and running gear of the AC/Shelby Cobra Mark II The most famous and numerous of these were the official works Shelby Daytona Cobra Coupes Six were constructed, each being subtly different from the rest

AC Cars also produced a Le Mans coupé The car was a one-off and was nearly destroyed after a high-speed tire blow-out at the 1964 Le Mans race The car was qualified conservatively second in GT The race started well with the AC, chassis number A98, maintaining its position in the top two in GT and even leading the class for a time This was not to last as an act of sabotage newspaper in the fuel tank began to block the fuel filter The car lost time until this was diagnosed and cleaned outcitation needed The car proceeded on at the predetermined conservative lap time and for the next stint remained trouble free The car was able to match the Shelby Daytona's speed despite running a higher differential ratio 288 instead of 307 and a lower state of engine tune for reliability 355 hp instead of the Daytona's 385 hp

The Willment race team became interested in Shelby's Cobra-based coupe and inquired on purchasing one Shelby turned down the offer, but supplied the drawings to Willment Dubbed the Willment Cobra Coupe, this car was fully built by the JWA racing team and numbered 2131 on the frame

427 Super Coupesedit

A prototype CSX 3027 was to become 427 Coupe, but since the focus was shifted towards the GT program, this project received little attention The bodywork and chassis were soon scrapped19

Two further chassis were ordered number CSX 3054 and CSX 3055 This project was also abandoned with just CSX 3054 receiving a body CSX 3055 was sold to the Willment Race Team and was fitted with a FIAT body designed by Ghia

1965 Willment/Ghia Coupe CSX3055

Counterfeit Cobrasedit

In 1993 the Los Angeles Times exposed a Carroll Shelby scheme20 to "Counterfeit" his own cars With the price of an original 427 ci Cobra skyrocketing, Shelby had, by his own written declaration executed under penalty of perjury, caused the California Department of Motor Vehicles the government agency responsible for titling vehicles and issuing operator permits to utter forty-three "Duplicate Titles" for vehicles that did not officially exist in company records A letter from AC Cars confirmed the fact that the chassis numbers Shelby had obtained titles for were never manufactured, at least by AC Cars Only fifty-five 427 ci Cobras had been originally produced out of a block of serial numbers reserved for 100 vehicles Shelby had taken advantage of a loophole in the California system that allowed one to obtain a duplicate title for a vehicle with only a written declaration, without the vehicle identification number appearing in the DMV's database or the declarant ever presenting an actual vehicle for inspection21 Shelby later admitted21 that the chassis had been manufactured in 1991 and '92 by McCluskey Ltd, an engineering firm in Torrance, California, and were not authentic AC chassis

Continuation Carsedit

50th-anniversary Cobra Limited Edition CSX8000

Since the late 1980s onwards, various companies have built what are known in the hobby as "Continuation Cars"

Shelby authorized continuations of the original AC-built Cobra series Produced in Las Vegas, Nevada, these cars retain the general style and appearance of their original 1960's ancestors, but are fitted with modern amenities Initially the car everyone wanted in a Continuation was a 427 S/C model which was represented in the CSX4000 series This was meant to continue where the last 427 S/C production left off, at approximately serial number CSX3660 in the 1960s

The initial CSX4000 series cars were completed from the chassis built by McCluskey Ltd as well as other new parts and reconditioned Ford engines Given the value of the vehicle many "extra" cars have appeared over the years, even some sharing the same chassis number Gradually as the vintage parts supply ran low, newly constructed frames and body panels were obtained from a variety of suppliers The production of chassis numbers CSX4001 to CSX4999 took roughly 20 years and many different business relationships to complete

In 2009, CSX4999 was produced, concluding the 4000 series Production has continued with the CSX6000 serial numbers, featuring "coil over" suspension

The 289 FIA "leaf spring" race version of the car is reproduced as CSX7000, and the original "slab side" leaf spring street car is the CSX8000 series The Daytona Coupe is reproduced as the CSX 9000 series

To date most continuations are produced in fiberglass, with some ordering cars with aluminium or carbon-fibre bodywork

In 2004, at the North American International Auto Show in Detroit, Ford unveiled a concept for a modernized AC Cobra The Ford Shelby Cobra Concept was a continuation of Ford's effort to bring back the retro sports cars that had been successful in the 1960s, including the Ford GT40 and the fifth generation Ford Mustang

In 2014 Shelby American announced a limited edition production of 50 cars for the 50th anniversary of the original 427 Shelby Cobra222

See alsoedit

  • Bill Thomas Cheetah, the 1963-started, Chevrolet Corvette-based private-venture challenger to the Cobra
  • The Snake and the Stallion



  1. ^ http://wwwshelbyamericancom%7C production=1962–1967
  2. ^ a b http://wwwgizmagcom/limited-edition-50th-anniversary-shelby-427-cobra/35395/
  3. ^ http://wwwlegendarymotorcarcom/inventory/1965-shelby-289-cobra-original-1310aspx
  4. ^ 1963 Shelby AC Cobra sales brochure, http://blogquartoknowscom Retrieved on 15 October 2015
  5. ^ "1962 AC Cobra 260 car technical specifications from Carfoliocom – 2 door 42 litre 4265 cc V8 2636 PS, 4 speed manual" Carfoliocom 22 August 2008 Retrieved 2 February 2011 
  6. ^ "1963 AC Cobra 289 car technical specifications from Carfoliocom – 2 door 47 litre 4727 cc V8 2748 PS, 4 speed manual" Carfoliocom 22 August 2008 Retrieved 2 February 2011 
  7. ^ "1968 Shelby Cobra 427 car technical specifications from Carfoliocom – 2-door 7-litre 7010 cc V8 3599 PS, 4-speed manual" Carfoliocom Retrieved 2 February 2011 
  8. ^ Friedman, Dave 1994 "1" Shelby Cobra: the Shelby American color archives MBI Publishing ISBN 978-0-87938-757-0 
  9. ^ a b Bornhop, Andrew May 2012 "Celebrating 50 Years of Shelby" Road & Track 63 9: 52–61 
  10. ^ "1966 Shelby Cobra 427 S/C" Supercarsnet Retrieved 1 February 2011 
  11. ^ "1966 AC Cobra 427 S/C" Supercarsnet Retrieved 1 February 2011 
  12. ^ "Barrett-Jackson Lot: 1301–1966 Shelby Cobra 427 "Super Snake"" barrett-jacksoncom Retrieved 1 May 2011 
  13. ^ "Barrett-Jackson Classic Car Show and Auction – 1966 Shelby Cobra 427 Supersnake" aboutcom 
  14. ^ "Carroll Shelby's Super Snake Sells For Record $5 Million Dollars" mustangblogcom 
  15. ^ "Car goes for £28million" thesuncouk London 10 May 2007 Retrieved 4 January 2008 
  16. ^ http://wwwponysitede/cobra_ghiahtm
  17. ^ http://wwwcarstylingru/en/car/1965_ford_xp_bordinat_cobra/
  18. ^ Büschi, Hans U, ed 1991 Automobil Revue 1991 in German and French 86 Berne, Switzerland: Hallwag p 151 ISBN 978-3-444-00514-5 
  19. ^ Peter Brock
  20. ^ "Winning The Battle Against Vehicle Insurance Fraud: Glossary of Vehicle Insurance Fraud Terms" PDF preinsuranceinspectioncom Archived from the original PDF on 4 November 2011 Retrieved 29 May 2012 
  21. ^ a b Dean, Paul 15 April 1993 "Car Trouble : Autos: Questions have been raised over Carroll Shelby's claim he's building 43 of his classic Cobras using original chassis Shelby says he's the victim of a business feud April 15, 1993 PAUL DEAN TIMES STAFF WRITER" latimescom Retrieved 28 May 2012 
  22. ^ http://wwwnydailynewscom/autos/news/bringing-back-beast-shelby-american-build-427-cobra-article-12061890

External linksedit

  • AC Cobra at Curlie based on DMOZ
  • AC Cobra at the Internet Movie Cars Database
  • Shelby Automobiles Inc, Las Vegas, Nevada
  • thecobraferrariwarscom
  • AC Cars website
  • AC Heritage website
  • AC Cobra 427 1969 Exterior and Interior in 3D 4K UHD
  • International club for owners of original and replica 289 Cobras and Aces

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