1962-1976 Triumph TR Specifications

The Triumph TR sports cars arrived in the 1950s and met with success over the next two decades. Here are specifications for the 1965-1972 Triumph TR models.

1974 Triumph TR6
This French Blue 1974 Triumph TR6 has the
steel factory hardtop.

1962-1976 Triumph TR: Specifications (U.S. Market)
General
Type front-engine, rear-drive two-seat roadster
Wheelbase (in.)
88.0
Overall length (in.) 156.0 (TR4: 159.0)
Overall width (in.) 57.5
Overall height, soft top erect (in.) 50.5
Track, front/rear (in.) 49.0/48.0 (TR6 50.25/49.0)
Ground clearance (in.) 6.0
Curb weight (lbs)
TR4: 2,240; TR4A: 2,212; TR250: 2,268; TR6: 2,390, rising to 2,438
Weight distribution (percent front/rear)
52/48
Hip room, front (in.) 2 x 21.5
Fuel tank (gal)
13.5
Construction
separate X-broad steel frame, all-steel bodyshell
Suspension, front
independent, coil springs, unequal-length A-arms, telescopic shock absorbers (plus anti-roll bar for TR6)
Suspension, rear
TR4, some TR4A: solid rear axle, half-elliptic leaf springs, lever-arm shock absorbers; Some TR4A, TR250, TR6: independent, coil springs, semi-trailing arms, lever,lever-arm shock absorbers
Transmission 4-speed , synchromesh on all forward gears; overdrive opt
Brakes hydraulic, font disc/rear drum
Swept area (sq in.)
370.0
Steering rack-and-pinion
Turns lock-to-lock
2.6
Turning circle (ft)
33.0
Final drive ratio
3.7:1; overdrive, 4.1:1
Tires TR4: 5.90-15; TR4A: 6.95-15; TR250: 185SR-15 radials


1962-1976 Triumph TR: Engines (U.S. Market)

TR4* TR4A TR250 TR6
Type ohv 1-4 ohv 1-4 ohv 1-6 ohv 1-6
Displacement (cu in.)
130.4
130.4 152.4 152.4
(cubic cent)
2,138 2,138 2,498 2,498
Bore x stroke (in.)
3.39 x 3.62 3.39 x 3.62 2.94 x 2.99 2.94 x 2.99
(millimeters) 86 x 92 86 x 92 74.7 x 76 74.7 x 76
Compression ratio
9.0:1 9.0:1 8.5:1 8.5:1-7.5:1
Carburetion 2SU or 2 Zenith Stromberg
2 Z-S 2 Z-S 2 Z-6
Horsepower @ rpm (net)
1.05 @ 4,700 1.05 @ 4,700 1.11 @ 4,500 1.06 @ 4,900**
Torque @ rpm (net)
1.28 @ 3,350 1.32 @ 3,350 1.52 @ 3,000 1.42 @ 3,000**

*An optional TR4 engine had 1,991 cc (121 cid) with a 3.39 x 3.62-inch bore and stroke; horsepower was 100 at 4,800 rpm, torque 117 lbs/ft at 3,000 rpm.

**Slight variation over the years



1962-76 Triumph TR: Performance

TR4 TR4A TR250 TR6
0-60 mph (sec)
10.9 11.4 10.6 10.7
0-80 mph (sec) 20.9 23.1 20.0 20.0
0-100 mph (sec) 46.3 48.8 39.0 39.0
0-ΒΌ mph (sec) 17.8 18.5 17.8 17.9
Top speed (mph)
102 109 107 107
Compiled from various sources


1962-1976 Triumph TR: Production

Total Export
TR4 40,253 37,661
TR4A 28,465 25,390
TR250 8,484 8,464
TR5 2,947 1,786
TR6 91,850 83,961
Total 171,999 157,262
How many cars were delivered to the USA? Accurate figures have never been released, but it is thought that at least 80 percent of all "export" TRs were sold in North America.

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