V4 engine

[1] The shorter crankshaft of the V4 engine is less susceptible to the effects of torsional vibration due to its increased stiffness and also because of fewer supports suffers less friction losses.

[2] Having two separate banks of components increases cost and complexity in comparison with inline four engines.

Additionally, any (four-stroke) V4 engine with shared crankpins will fire unevenly which will result in more vibration and potentially require a heavier flywheel.

The car retired from the French Grand Prix after just four laps, however, it later set a speed record of 164 km/h (102 mph).

[10] The AMC Air-cooled 108 was a 108 cu in (1.8 L) engine built from 1960 to 1963 for use in the lightweight M422 Mighty Mite military vehicle.

[11][12] The M422 developed was by American Motors Corporation (AMC) in the United States and specifically designed to be transported by helicopter.

[20] The Silver Hawk used a narrow-angle 16-degree V4 engine with a single cylinder head, pushrod valve actuation, and air cooling.

In 1958, both Johnson and Evinrude introduced 70.7 cu in (1,159 cc) V4 outboards rated at 50 hp (37 kW) and weighing 200 lb (91 kg).

[24] By 1972, the same basic V4 block was producing more than double the horsepower in stock form because of the experience manufacturers gained from racing.

[25] In 1988, Yamaha introduced a 130 hp (97 kW) two-stroke V4 to the US market with what was called "precision blend" oil injection.

[30] In the mid-1940s, Turner Manufacturing in the United Kingdom produced a diesel water-cooled V4 engine for industrial and marine uses.

[31] Mitsubishi Heavy Industries built the 4ZF, an air-cooled diesel-powered V4 engine used in the Type 73 armored personnel carrier and related Japanese military vehicles since 1973.