Triumph TR4A
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| Triumph TR4A | |
|---|---|
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| Manufacturer | Triumph Motor Company |
| Production | 1965–1968 |
| Predecessor | Triumph TR4 |
| Successor | Triumph TR5 |
| Class | Sports car |
| Layout | FR layout |
| Engine(s) | 2138 cc straight-4 |
| Transmission(s) | 4-speed manual[1] |
| Wheelbase | 2,235 mm (88.0 in)[1] |
| Length | 3,962 mm (156.0 in)[1] |
| Width | 1,473 mm (58.0 in)[1] |
| Height | 1,207 mm (47.5 in)[1] |
| Curb weight | 1,016 kg (2,240 lb)[1] |
| Fuel capacity | 53.4 L (11.7 imp gal/14.1 US gal)[1] |
The Triumph TR4A was built between 1965 and 1968 by the Triumph Motor Company in the United Kingdom.
The TR4A was an evolution of the TR4, updated with a new chassis. It was hoped the new, but more complex independent rear suspension would address the buying publics' desire for more comfortable riding sports cars. This version has an "IRS" badge on the rear. It's estimated 75% of TR4A were built with IRS.[citation needed] In 1965, the TR4A IRS sold in the United Kingdom for approximately £968, with wire wheels being another £36, overdrive £51, heater £13 and seat belts £4 each.[2] In the United States the model sold for just under $2500 and accessory prices included: heater, $64; seat belts, $17; A.M. radio; $?; toneau cover, $35, W/S washer; $10. outside mirror;$5.50 and battery box; $5.95
In response to dealer requests, approximately 25% of TR4As were produced with a solid rear axle option (also called a live axle), similar to the earlier TR4. The TR4A was the first vehicle to ever offer an option for axle type.[citation needed]
The new suspension eventually proved itself with the buying public and in racing, with three TR4A IRS models posting a team win and finishing 1st, 2nd and 3rd in class at the Sebring 12-hour race of 1966. Albeit now the live axle is superior in racing due to its much better hp to weight ratio, also besting the TR6.
In 1968 the TR4A was replaced by the 6-cylinder TR5 (European model with fuel injection) and TR250 (U.S. model with twin carburetors), both of which continued to use the same body design.
[edit] Specifications
- Engine: 2,138 cc, 4 cylinder, 86 mm bore, 92 mm stroke, 9:1 compression ratio, 104 bhp (78 kW). The long stroke along with the length of the piston rods give this engine much of its torque.
- Turning circle: 10.1 m (33 ft)
- Capacities:
- Fuel tank: 53.4 L (11.75 imp gal/14.11 US gal)
- Engine sump: 6.2 L (1.36 imp gal/1.64 US gal)
- Gearbox: 0.85 L (0.19 imp gal/0.22 US gal)
- Acceleration in top:
- 30 to 50 mph: 8 s
- 40 to 60 mph: 8 s
- 60 to 80 mph: 11 s
[edit] References
[edit] External links
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