"TR3B"
The "Triumph TR3B" is an unofficial name given nowadays to the final version of the TR3, which was produced in 1962. It was offered concurrent with the TR4, which started production in 1961. The "TR3B" was a special short-production run in response to dealer concerns that the buying public might not welcome the TR4.
It had the body of the "TR3A" (Except that the body panels had raised stampings under the bonnet and boot hinges and under the door handles. In addition, the windscreen was attached with bolts rather than the Dzus connectors used on "A" models.), but the 2,138 cc. engine and all synchromesh transmission of the TR4. The engine is a straight-4, pushrod, 3-bearing, with wet liners. It had 9:1 compression and was very rigid. It was fitted with two H6 SU carburettors. It had 105 hp (78 kW) at 4,650 rpm and 172 N·m (127 lbf·ft) of torque at 3,350 rpm. It got around 20 miles per US gallon (12 L/100 km; 24 mpg) to 30 miles per US gallon (7.8 L/100 km; 36 mpg). The top speed was limited to about 110 mph (177 km/h) by the gear ratio, unless it had overdrive. Electrically triggered overdrive (Laycock-de-Normanville Type A) was available as an option and operated on 2nd, 3rd, and 4th gears. Appearance was identical to the "TR3A", and as such very similar to the TR3, except for a wider grille and door handles. It weighed 2,137 lb (969 kg).
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