BMW M20B23 Engine
This page lists the M20B23 specifications for the engine built by BMW.
| Fuel Type | Petrol |
|---|---|
| Configuration | I6 |
| Combustion Type | Naturally Aspirated |
| Displacement (cc) | 2,316 cc |
| Cylinders | 6 |
| Cylinder Bore (mm) | 80 mm |
| Cylinder Stroke (mm) | 76.8 mm |
| Valves | 12 |
| Valves Per Cylinder | 2 |
| Valvetrain | SOHC |
| Compression Ratio | 9.5:1 |
| Power (kW) | 110 kW @ 6,000 RPM |
| Torque (N⋅m) | 205 N⋅m @ 4,000 RPM |
| Redline (RPM) | 6,500 RPM |
| Weight (kg) | |
| Production | 1977 - 1987 |
Where listed, power output figures are based on the most powerful production variant of that engine, because some manufacturers use different engine maps to tune the same engine for better fuel economy, performance or to differentiate models in the range.
From 1977 until1982, K-Jetronic Fuel Injection was used, with a compression ratio of 9.5:1 and a redline of 6,400 RPM. This initial version of the engine used the same 200 cylinder head as the M20B23 but with a longer stoke. Power output was 105 kW @ 5,300 RPM, torque 190 N⋅m @ 4,500 RPM.
Between 1982 and 1983, LE-Jetronic Fuel Injection was used, the 731 cylinder head and an increased compression ratio of 9.8:1. This changed power output to 102 kW @ 5,300, torque 205 N⋅m @ 4,000 RPM..
From 1984 until the end of production in 1987, exhaust and camshaft were upgraded, along with an increased redline of 6,500. Power output was 110 kW @ 6,000 RPM, torque 205 N⋅m @ 4,000 RPM.
The M20B23 was not sold in North America.
Last Updated: 19th October 2020 at 20:58:07