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Four-cylinder diesel engine in the BMW 120d and 123d.

The BMW 123d is the world's first four-cylinder engine with Variable Twin Turbo. Two different-sized turbochargers are deployed sequentially to dispense extra power right across the rev range. At low revs, the small turbocharger works on its own to provide instantaneous throttle response. Third-generation common rail injection ensures exceptional performance (up to 150 kW/204 hp) in hand with unbeatable fuel consumption levels (ca. 5 l/100 km). And thanks to the engine block now being made solely of aluminium, weight is reduced by an enormous 20 kg.

Fuel consumption / CO2 emissions


Combined fuel consumption: 4.8 to 5.6 l/100 km
Combined CO2 emissions: 128 to 148 g/km

Further information about the official fuel consumption and the official specific CO₂ emissions for new passenger automobiles can be found in the "New Passenger Vehicle Fuel Consumption and CO₂ Emission Guidelines", which are available free of charge at all sales outlets and from DAT Deutsche Automobil Treuhand GmbH, Hellmuth-Hirth-Str. 1, 73760 Ostfildern, Germany.