4B10
Specifications
Engine type Inline 4 cylinder DOHC 16v, MIVEC
Displacement 1.8 L (1798 cc)
Bore 86 mm
Stroke 77.4 mm
Compression ratio 10.5:1
Fuel system ECI multiple
Peak power 105 kW (143 PS) at 6000 rpm
Peak torque 177 N?m (130 ft?lbf) at 4250 rpm
4B11
Specifications
Engine type Inline 4 cylinder DOHC 16v, MIVEC
Displacement 2.0 L (1998 cc)
Bore 86 mm
Stroke 86 mm
Compression ratio 10:1
Fuel system ECI multiple
Peak power 108-114 kW (147-155 PS) at 6000 rpm
Peak torque 198 N?m (146 ft?lbf) at 4250 rpm
Characteristics
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The engines?s bore and stroke both measure 86.0 mm, which engineers refer to as square. According to Mitsubishi, the new cylinder dimensions contribute to a free-revving character (6,500 rpm redline, 8000 rpm final), linear power delivery and wide torque curve. Mitsubishi used a timing chain instead of a belt for better reliability, iridium spark plugs to lower emissions and to help extend major service intervals for lower cost of ownership. To reduce weight, Mitsubishi used a plastic cam cover and intake manifold and double-layer stainless steel exhaust manifold. The exhaust manifold has a rear location on the transverse engine, compared to the front location for the previous engine, yielding important benefits such as better emissions performance. To lower vibration, Mitsubishi used a 4-point inertial axis system with cylindrical hydraulic engine mounts on the left and right sides. A lightweight, high-rigidity squeeze-cast aluminium bracket on the right side mount (engine side) lowers engine noise under acceleration. A lightweight, high-rigidity steel plate bracket on the left side mount (transmission side) lowers gear noise. A custom-tuned insulator was developed for the front and rear mounts to help control both idle vibration and acceleration shoc....
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