MG J-type
| MG J-Type | |
|---|---|
 |
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| Overview | |
| Manufacturer | MG |
| Production | 1932–1934 2494 made |
| Body and chassis | |
| Class | sports car |
| Body style | 2-door roadster Salonette |
| Chronology | |
| Predecessor | MG C and D Type Midget |
| Successor | MG P-type Midget |
| MG J1 | |
|---|---|
| Overview | |
| Production | 1932–1933 380 made |
| Powertrain | |
| Engine | 847 cc Straight-4 |
| MG J2 | |
|---|---|
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J2 1933
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|
| Overview | |
| Production | 1932–1934 2083 made |
| Powertrain | |
| Engine | 847 cc Straight-4 |
| MG J3 | |
|---|---|
| Overview | |
| Production | 1932–1933 22 made |
| Powertrain | |
| Engine | 746 cc Straight-4 |
| MG J4 | |
|---|---|
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|
| Overview | |
| Production | 1932–1933 9 made |
| Powertrain | |
| Engine | 746 cc Straight-4 |
The MG J-type is a sports car that was produced by MG from 1932 to 1934. This 2-door sports car used an updated version of the overhead camshaft, crossflow engine, used in the 1928 Morris Minor and Wolseley 10 and previously fitted in the MG M-type Midget of 1929 to 1932, driving the rear wheels through a four-speed non-synchromesh gearbox. The chassis was from the D-Type with suspension by half-elliptic springs and Hartford friction shock absorbers all round with rigid front and rear axles. The car had a wheelbase of 86 inches (2184 mm) and a track of 42 inches (1067 mm). Most cars were open two-seaters, but a closed salonette version of the J1 was also made, and some chassis were supplied to external coachbuilders. The open cars can be distinguished from the M type by having cut-away tops to the doors.
The J1 was the four-seat car in the range. The engine was the 847 cc unit previously seen in the C-type with twin SU carburetors giving 36 bhp. The car cost £220 in open and £225 in Salonette form.
The J2, a road-going two-seater, was the commonest car in the range. Early models had cycle wings, which were replaced in 1933 by the full-length type typical of all sports MGs until the 1950s TF. The top speed of a standard car was 65 mph (105 km/h), but a specially prepared one tested by The Autocar magazine reached 82 mph (132 km/h). The car cost £199.
The most serious of the J2's technical failings is that has only a two-bearing crankshaft, which can break if over-revved. The overhead camshaft is driven by a vertical shaft through bevel gears, which also forms the armature of the dynamo. Thus any oil leak from the cambox seal goes into the dynamo brushgear, presenting a fire hazard.
Rather than hydraulic brakes the car has Bowden cables to each drum. Although requiring no more pedal force than any other non-power-assisted drum brake if they are well maintained, the drums themselves are small, and even in period it was a common modification to replace them with larger drums from later models.
The J3 was a racing version with the engine capacity reduced to 746 cc by shortening the stroke from 83 to 73 mm and fitted with a Powerplus supercharger. The smaller engine capacity was to allow the car to compete in 750 cc class racing events. Larger brakes from the L-type were fitted.
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Wikipedia