J4
The J4 was a pure racing version with light-weight body work and the J3 engine, but using more boost from the supercharger to obtain 72 bhp.
Read more about this topic: MG J-type
J4
The J4 was a pure racing version with light-weight body work and the J3 engine, but using more boost from the supercharger to obtain 72 bhp.
Read more about this topic: MG J-type