The Vintage Triumph Registry
[ Triumph GT6 Mk1 ] [ Triumph GT6 Mk2 ] [ Triumph GT6 Mk3 ]
Triumph GT6 Mk 1
Built: July 1966 to September 1968 Total number: 15,818 Chassis numbers: KC1 to KC13752 Engine: Cast iron block and head. Straight 6 engine with 4 main crankshaft bearings. Capacity: 1998cc. Bore and stroke: 74.7x76mm. Compression ratio: 9.5:1 (8.5:1 for U.S., 1968-). Twin Zenith Stromberg CD150 carburettors. Max.power: 95bhp@5000rpm Max.torque 117lb-ft @ 3000rpm Transmission: Rear wheel drive from front-mounted engine. 4-sp gearbox bolted to rear engine plate. Direct gear change. Clutch: 8.5" diaphragm type. All synchromesh gearbox. Final drive 3.27:1 (3.89:1 with opt. overdrive). Overall ratios - non-overdrive: 3.27:1 top, 4.11:1 third, 5.82:1 second, 8.66:1 first. Reverse 10.13:1. Overall ratios with over- drive: 3.89:1 top (3.11:1 o/d), 4.86:1 third (3.89 o/d), 6.92:1 second, 10.30 first. Reverse 12.06:1
Gearbox ratios: 1.00:1 top, 1.25:1 third, 1.78:1 second, 2.65:1 first, 3.10:1 reverse 20.1 mph/1000rpm top non-o/d 21.2 mph/1000rpm top o/d (3.89:1 final drive) Wheelbase and track: Wheelbase 6ft 11in. Track: front 4ft 1in, rear 4ft 0in. Suspension: Front: Independent double wishbone type with coil springs. Telescopic shock absorbers with anti-roll bar. Rear: Independent swing axle with transverse leaf spring, trailing radius arm and telescopic shock absorbers. Steering: Rack and pinion with impact absorbing steering column. 4-1/4 turns lock to lock. Turning circle 25ft 3in. Brakes: 9.7in dia. front discs. 8x1-1/4in rear drums. Wheels ard tyres: 155-13in radial tyres on 4.5in pressed steel or optional centre-lock wire wheels (standard on most U.S.-spec. cars). Bodywork: 2-seater sports Coupe. Opening rear tailgate. Optional 2+2 rear seats. Dimensions and weight: Length: 12ft 1in Width: 4ft 9in Height: 3ft 11in Unladen weight: 1904 lb Electrical system: 12-v negative earth. 56 amp-hr battery with dynamo. Performance: 0 - 50 mph: 7.8 sec 0 - 60 mph: 11.1 sec Top speed: 108 mph Touring fuel consumption: 31 mpg (Imp.)
Triumph GT6 Mk 2
(Known as the GT6+ in the USA)
General specifications as GT6 but:
Built: July 1968 to December 1970 Total number: 12,066 Chassis numbers: KC50001 to KC58046 (1969 models) KC75001 to KC82398 (1970 models) Engine: Compression ratio: 9.25:1 (8.5:1 -- U.S.) Max.power: 104 bhp @ 5300 rpm (95 bhp @ 4700 rpm (U.S.) Transmission: As GT6 but overdrive now available with either 3.89:1 or 3.27:1 final drive. Overall ratio revisions with 3.27:1 final drive: 3.27:1 top (2.62:1 with overdrive), 4.11:1 third (3.29:1 overdrive). 20.1 mph/1000 rpm top gear (3.27:1 final drive) 25.2 mph/1000 rpm top gear (3.27:1 final drive) with overdrive. Wheelbase and track: Rear track: increased to 4ft 1in Suspension: Independent rear suspension with bottom "reversed" wishbone and transverse rear leaf spring featuring rubber 'rotoflex' coupled drive shafts. Wheels and tyres: As before, except steel wheels with "dummy Rostyle" wheel covers standard. Centre-lock wire wheels optional through 1969 but dropped for 1970 models in U.S. Length: 12 ft 3 in Electical System: Alternator charging system Performance: 0 - 50 mph: 7.2 sec 0 - 60 mph: 10.0 sec Top Speed: 111 mph
Triumph GT6 Mk 3
Specifications as per GT6 Mk 2/GT6+ but: Built: October 1970 to December 1973. Total number: 13,042. Chassis numbers: 1971 model: KE1 and on (KF prefix for U.S. cars) 1972: KE (KF) 10001 and on 1973: KE (KF) 20001 to 24218 Engine: Compression ratio: 9.25:1 Max.power: 104 bhp @ 5300 rpm 95 bhp @ 4700 rpm (1971, U.S.) C/R 8.0:1; 79 bhp (1972-73, U.S. engines with UE suffix) Transmission: 3.89 final drive standard with optional overdrive. Overall reverse gear ratio 9.85:1 non-overdrive, 11.71:1 (overdrive). Suspension: Rear suspension changed to swing spring type from chassis number KE20001-February 1973. (Rear track increased to 4ft 2in); 8x1-1/2in self-adjusting rear brakes. Wheels and tyres: "Ventilated" steel disc wheels; bolt-on Dunlop wire wheels optional. Dimensions and weight: Length: 12ft 5in Width: 4ft 10-1/2in Weight: 2030 lbs Performance: 0-50 mph: 7.7 sec. 0-60 mph: 10.1 sec. Top speed: 112 mph
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