Available from 2014, the BMW B48 was a four-cylinder turbocharged petrol engine. The B48 was a part of BMW’s modular family of engines which included the three-cylinder B38 petrol engine, the three-cylinder B37 diesel and four-cylinder B47 diesel engines. For three- and four-cylinder engines of the same fuel type, around 60 per cent of components were shared; for engines of different fuel types, around 40 per cent of components were shared. All four engines were manufactured on a single assembly line at BMW’s Steyr plant in Austria and production was estimated at 5500 engines per day.
The B48 engine had an aluminium block and cylinder head, a twin-scroll turbocharger, direct fuel injection with piezo-electric injectors, double overhead camshafts (chain-driven), variable intake and camshaft timing (BMW’s double VANOS), four valves per cylinder and variable intake valve lift (BMW’s ‘Valvetronic’). While the B48A20M0 had a compression ratio of 10.2:1, the compression ratio for the B48A20O0 was 11.0:1.
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| Engine | Capacity | Peak power | Peak torque | Models | Years |
|---|---|---|---|---|---|
| B48A20M0 | 1998 cc (82.0 x 94.6) |
141kW at 4700-6000rpm | 280Nm at 1250-4750rpm (300Nm with o’boost) |
F45 Active Tourer 220i, F55/F56 MINI Cooper S |
2014-on |
| BMW F48 X1 sDrive20i, F48 X1 xDrive20i, Mini F54 Clubman Cooper S |
2015-on | ||||
| B48A20O0 | 1998 cc (82.0 x 94.6) |
170kW at 4750-6000rpm | 350Nm at 1250-4500rpm | F45 Active Tourer 225i | 2014-on |
| BMW F48 X1 xDrive25i | 2015-on | ||||
| B48B20 | 1998 cc (82.0 x 94.6) |
170kW at 5200-6000rpm | 320Nm at 1250-4800rpm | F56 MINI John Cooper Works | 2015-on |
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