SPECIFICATIONS
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
