B.M.C. 3•13-LITRE DIESEL STANDARD
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'THE B.M.C. 3-8-litte four-cylinder I direct-injection diesel engine, originally introduced as optional to the standard 3.4-litre unit in September, 1962, has now been adopted as standard in Austin and Morris 2-, 3and 4-ton goods chassis. The actual models affected by ' this specification change are the FG K40 2-ton, FG K60 3-ton and FG K80 4-ton forward-control vehicles and the normal control WE K60 3-tonner.
Prices are unchanged, being £7 10s. more than for the original 3-4-litreengined models.
The 3.8-litre diesel has a net output of 68 b.h.p. at 2,400 r.p.m., which is 17 per cent greater than the net output of the 3.4-litre unit. The gross rating in accordance with S.M.M.T. Test Code 159 is 76 b.h.p. at 2,600 r.p.m., which is 12 per cent above the smaller engine's rating. The torque of the 3-8-litre design is 168 lb. ft. at 1,750 r.p.m., as against
150 lb. ft. at 1,500 r.p.m. for the 3.4-litre engine—an improvement of 12 per cent. The bigger engine is identical in basic design to the 3.4-litre type, and differs mainly in having a cylinder-bore dimension of 100 mm. compared with 95 mm. Unlike all other diesel engines made by B.M.C., which nowadays have C.A.V. distributor-type fuel-injection pumps as standard, the 3.8-litre engine has a Simms in-line pump.
Standaidization of the larger engine has not entailed any gearbox or rear-axle changes, so the maximum speeds of models affected remain unchanged: the approximate speeds are 50 m.p.h. for 2and 3-tanners and 45 m.p.h. for the 4-tanner. As an alternative to the diesel engine. the B.M.C. 4-litre petrol engine continues to be offered in all Austin and Morris 2-, 3and 4-ton chassis. This six-cylinder unit develops 90 b.h.p_at 3,000 r.p.m. and 203 lb. ft. torque at 1,000 r.p.m.