M30
The M30 engine was BMW's Big Six engine. Although it shared the six-cylinder arrangement of the Baby Six M20 engine, the M30 is actually a development of the four-cylinder M10, with which it shares a number of design features. The M30 is a chain-driven SOHC engine.
Despite its age, the M30 is a powerful engine and has proved to be a very popular engine swap for its excellent torque characteristics.
Contents
Overview
The M30 started life in the late Sixties, when the power limits of the M10 were realised. By adding two more pistons to the existing design BMW were able to produce their first six-cylinder engine. Crowned the New Six, it became the eponymous powerplant for BMW's Neu Klasse of cars, the E3 and E9. These big motors rolled off the production line in 1968 in 2.5 and 2.8 litre forms.
The M30 even received a turbocharger for the E23. Released in two capacities, the name was changed to M102 for the 3.2 litre, and M106 for the 3.4 litre version.
Versions
0| Engine | Displacement | Power | Torque | Redline | Bore | Stroke | Year |
|---|---|---|---|---|---|---|---|
| M20B25 | 2.5 L (2478 cc/151 in³) 2.5 L (2494 cc/152 in³) |
110 kW (148 hp) @ rpm | N·m ( ft·lbf) @ rpm | 1968–1971 1972–1987 | |||
| M20B28 | 2.8 L (2769 cc/169 in³) 2.8 L (2788 cc/170 in³) |
130 kW (170 hp) @ rpm 135 kW (181 hp) @ 5800 rpm |
251 N·m (185 ft·lbf) @ rpm 235 N·m (173 ft·lbf) @ 4200 rpm |
86mm | 80mm |
1968–1971 1972–1987 | |
| M20B30 | 3.8 L (2769 cc/169 in³) 2.8 L (2788 cc/170 in³) |
130 kW (170 hp) @ rpm 135 kW (181 hp) @ 5800 rpm |
251 N·m (185 ft·lbf) @ rpm 235 N·m (173 ft·lbf) @ 4200 rpm |
86mm | 80mm |
1968–1971 1972–1987 | |
| M30B30 | 3.0 L (2986 cc/182 in³) | kW ( hp) @ | N·m ( ft·lbf) @ | mm | mm | 1975 |
