BMW Z4: High Precision Injection and Twin Turbo

The sum of all parts.

High Precision Injection and Twin Turbo
in the BMW Z4 Roadster.

Two milligrams of petrol - that's how precise the High Precision Injection (HPI) controls the fuel-air mix. The dosage of the fuel injected is precisely ensured by the piezo injectors with only part of the combustion chamber being filled under lower partial loads. Thanks to the Twin Turbo, it is now possible for the straight six-cylinder engine to provide a supreme standard of power and performance previously only conceivable with far larger engines. Engine weight is also much lower, inter alia on account of the all-aluminium crankcase, which naturally benefits the agility of the entire car and offers more power on less fuel.

Fuel consumption / CO2 emissions


Figures for BMW Z4 sDrive20i
Fuel consumption
Combined: 6.8 l/100 km
Urban: 9.1 to 8.9 l/100 km
Extra-urban: 5.6 to 5.5 l/100 km
CO2 emissions combined: 159 g/km

Figures for BMW Z4 sDrive28i
Fuel consumption
Combined: 6.8 l/100 km
Urban: 9.1 to 8.9 l/100 km
Extra-urban: 5.6 to 5.5 l/100 km
CO2 emissions combined: 159 g/km

Figures for BMW Z4 sDrive35i
Fuel consumption
Combined: 9.4 to 9.0 l/100 km
Urban: 13.5 to 12.6 l/100 km
Extra-urban: 7.0 to 6.9 l/100 km
CO2 emissions combined: 219 to 210 g/km

Figures for BMW Z4 sDrive35is*
Fuel consumption
Combined: 9.0 l/100 km
Urban: 12.6 l/100 km
Extra-urban: 6.9 l/100 km
CO2 emissions combined: 210 g/km

* Standard with 7-speed sport automatic transmission with double clutch.

The figures for fuel consumption and CO2 emissions depend on the wheel and tyre sizes selected.

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.