Lets start with the 3A90's specs:
(For info on the 3A92 (1.2L) engine see here: 3A92 Engine Information)
Displacement: 1.0L (999 CC) Cylinders: 3 Valves: 12 Maximum Output: 52 kW (71 PS / 70 HP) @ 6000 rpm Maximum Torque: 88 Nm (64 lb·ft) @ 5000 rpm Bore: 75 mm Stroke: 75.4 mm Compression Ratio: 11.5:1 Fuel Delivery: multi point fuel injection Fuel type: Unleaded regular gasoline, gasohol E10, E20 Valve Technology: DOHC, MIVEC (Mitsubishi Innovative Valve timing Electronic Control) - see video: New MIVEC continuously variable valve control mechanism Fuel Economy: see Fuel economy ratings by country
Torque curve:
Horsepower and Torque comparison: (red 3A92, orange 3A90)
Additional features:
- Exhaust manifold with integrated catalytic converter (reduces weight, lowers emissions)
- Additional weight reduction through: aluminum cylinder block; crankshaft chain case integrated with engine mount
- EGR module for increased fuel economy, reduced emissions
- Friction reducing measures: lower rigidity piston skirt; plastic piston coating; lower valve spring loads; smoother camshaft journal; lower oil pump output
Source: http://www.mitsubishi-motors.com/en/...S_EnP_3A90.pdf
Images:
Source: http://www.jsae.or.jp/e07pub/yearboo...ne_engines.pdf