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  • Triumph TR4A (1965-1967)

Triumph TR4A

 1965 to 1967
Triumph TR4A motor car history
Overview
Manufacturer Triumph Motor Company
Production 1965–1967
Body and chassis
Class Sports car
Body style 2-door roadster
Layout FR layout
Powertrain
Engine 2,138 cc (2.1 L) I4
Transmission 4-speed manual
Dimensions
Wheelbase 2,235 mm (88.0 in)
Length 3,962 mm (156.0 in)
Width 1,473 mm (58.0 in)
Height 1,207 mm (47.5 in)
Curb weight 1,016 kg (2,240 lb)
Chronology
Predecessor Triumph TR4
Successor Triumph TR5

 

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 public's desire for more comfortable riding sports cars. This version has an "IRS" badge on the rear. It has been estimated that 75 percent of TR4A were built with IRS. In 1965 the TR4A IRS sold in the UK for approximately £968, with wire wheels being another £36, overdrive £51, heater £13 and seat belts £4 each; it sold for just under $2500 in the US.

Triumph TR4A interior view

In response to dealer requests, about 25 percent 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 offer an option for axle type.

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.

Triumph TR4A irs rear

In 1968 the TR4A was replaced by the 6-cylinder TR5 (European model with fuel injection) and TR250 (US model with twin carburetors), both of which used the same body design.

Triumph TR4A rear open view

Coachwork

Like the TR4, the TR4A was also available with the "Surrey Top" hard top system; a weather protection system with rigid rear section including the rear window and removable fabric section over the driver's and passenger's heads. This aesthetically foreshadowed the silhouette of Targa top cars.

 TR4A (1965-67) history

 

Specifications

  • Engine: 2138 cc, 4-cylinder, 86 mm bore, 92 mm stroke, 9:1 compression ratio, 104 bhp (78 kW). The long stroke give this engine much of its torque. Standard inline-four engine
  • 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 (48 to 80 km/h): 8 s
40 to 60 mph (64 to 97 km/h): 8 s
60 to 80 mph (97 to 130 km/h): 11 s

A Triumph TR4A in the Heartbeat, TV series

Triumph TR4A in Heartbeat, TV

 

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British Automotive 1960s | Vehicles launched in 1965 | British Sports cars | Triumph TR Range | Sebring | Heartbeat | Sports Cars

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