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PERKINS INTRODUCE HIGHER-POWER FOUR-CYLINDER DIESEL
Page 58
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AN automotive version of the 4.107 four-cylinder agricultural engine has been introduced by Perkins Engines Ltd. The new unit has been given the type name 4.108, and, like the 4.107, is a development of the 4.99 diesel used by a number of vehicle manufacturers in light commercials. The 4.107 was introduced in 1961 (as reported in The Commercial Motor of June 2, 1961) and was produced originally by the French Perkins company. Both the 4.108 and 4.107 have capacities of 1.76 litres (107.4 cu. in.) and they differ from the 4.99, which is continuing in production, in having a bore of 3125 in. (79-4 mm.) compared with 3-0 in. (75-2 mm.) in the 4.99. The stroke dimension is 3-5 in. (88.9 mm.).
Power output of the 4.108 is 52 b.h.p. gross at 4,000 r.p.m. and the maximum gross torque is 79 lb. ft. at 2,000 r.p.m. These figures compare with 45 b.h.p. gross and 74 lb. ft. maximum torque at the same speeds for the 4.99. For agricultural equipment, the 4.107 has ratings of 41 b.h.p. gross at 3.000 r.p.m. and 80 lb. ft. torque at 1,800 r.p.m.