Honda C Engine - C25A


SOHC 24 valves, 9.0:1 compression


  • 165 PS (121 kW; 163 hp) @ 6,000 rpm
  • 21.5 kg·m (211 N·m; 156 lb·ft) @ 4,500 rpm

North America:

  • 1986-1987 Honda Legend Sedan, 1986-1988 Rover 825 Sedan,
    • 151 bhp (113 kW; 153 PS) @ 5,800 rpm
    • 21.7 kg·m (213 N·m; 157 lb·ft) @ 4,500 rpm
    • UK and Europe (sold in US as Sterling 825i)

The engine utilized a 90 degree V-angle to the crankshaft in preference to the taller but more common 60 degree design, with a compression ratio of 9.0:1. The crankshaft had crankpins offset 30 degrees to provide a low profile engine that fires smoothly and evenly. The block and cross flow pent roof cylinder heads with 24 valves are die-cast from aluminum alloy and the cylinder bores are lined with cast iron. The exhaust system uses equal length exhaust pipes connected to the Exhaust manifold to minimize scavenging resistance and maximum total exhaust efficiency. An external high capacity water cooled oil cooler and filter maintain an efficient oil temperature.

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