The previous advanced overhead-cam inline-four engine was by then not in use by any other production car so it was replaced by the MPJG OHV unit from the Wolseley Ten, but with twin SU carburettors, modified camshaft and manifolding.
The four-speed manual gearbox gained synchromesh on the two top ratios and was connected to the engine by a cork-faced clutch running in oil.
Wind-up windows were fitted to the higher topped doors making the car more weathertight and individual bucket seats used in the fully carpeted interior.
It had a smaller but more modern XPAG engine as fitted to the Morris Ten Series M, but in a more highly tuned state and like the TA with twin SU carburettors.
[citation needed] Available as an open two-seater or more luxurious Tickford drophead coupé, this is the rarest of the T-type cars, as production began just prior to Britain's entry into World War II.
[citation needed] Only 379 TBs were made before the MG factory emptied its buildings and switched to making major aircraft components and modifying tanks.
It was quite similar to the pre-war TB, sharing the same 1,250 cc (76 cu in) pushrod-OHV engine with a slightly higher compression ratio of 7.4:1 giving 54.5 bhp (40.6 kW) at 5200 rpm.
[6] The export version had slightly smaller US specification sealed-beam headlights (7-inch buckets) and twin tail lights, as well as turn signals and chromed front and rear bumpers with over riders.
The body was approximately 4 inches (100 mm) wider than the TB measured at the rear of the doors to give more cockpit space.
The TD Midget, announced in January 1950,[9] combined the TC's drivetrain, a modified hypoid-geared rear axle, the MG Y-type chassis, a familiar T-type style body and independent suspension on front axle using coil springs from the MG Y-type saloon: a 1950 road-test report described as "most striking" the resulting "transformation ... in the comfort of riding".
[10] In addition the TD featured smaller 15-inch (380 mm) disc type road wheels, a left-hand drive option and standard equipment bumpers and over-riders.
[10] In 1950 the TD MkII Competition Model was introduced, produced alongside the standard car, with a more highly tuned engine using an 8.1:1 compression ratio giving 57 bhp (43 kW) at 5,500 rpm.
The higher compression ratio engine was offered with export markets in mind, and would not have been suitable for the UK, where carryover wartime restrictions limited fuel to 72 octane "pool petrol".
[2] The main complaint that US owners had with the MG TD sold in the US was the British 12-volt electrical system, which was hard to service when most US cars were still using 6 volts.
The car was designated TF1500, and externally distinguished by a cream background enamel nameplate on both sides of the bonnet, placed just to the rear of the forward bonnet-release buttons.