BMW has given the scrumptious Z4 and kick in the bum with the busty turbo give the engines more oomph with less petrol. 

Two new BMW TwinPower Turbo engine variants join the range.

BMW has again underlined its powertrain prowess with the debut of a new TwinPower Turbo four-cylinder petrol engine in the BMW Z4 range.

Available in two outputs, 180 kW and 135 kW, the powerplant reflects a new era in BMW engine development utilising advanced turbo-charging technology to maximise both power and fuel economy.

Codenamed N20, it features a twin-scroll turbocharger with VALVETRONIC, Double-VANOS and High Precision Injection.

Spearheading the new four-cylinder turbo range is the 180 kW TwinPower Turbo Z4 sDrive28i.

It sprints from zero to 100 km/h in just 5.7 seconds (0.1 seconds quicker than the naturally aspirated predecessor Z4 sDrive30i) thanks to a 13 per cent increase in torque (from 310 to 350 Nm).

Fuel consumption reduces by 21 per cent, improving from 8.5 litres per 100 km to 6.7 litres.

This not only provides a direct customer benefit, but also positions the new Z4 sDrive28i easily below the federal government’s fuel efficient luxury car tax threshold.

As a consequence, BMW has been able to significantly improve the customer value offered by the Z4 sDrive28i with a retail price of $89,400, compared to $98,700 for the predecessor Z4 sDrive30i.

The switch from six to turbocharged 4-cylinder engine has endowed the Z4 sDrive28i with the combination of remarkable performance and retail price below $90,000.

For the new Z4 sDrive20i, a turbo-charged four-cylinder engine replaces the previous naturally-aspirated six-cylinder engine in the Z4 sDrive23i.

Delivering 135 kW and 20 Nm more than before (from 250 to 270 Nm), the new engine reduces fuel consumption by 1.8 litres to 6.7 litres per 100 kilometres.

The Z4 sDrive20i also slips in below the fuel efficient luxury car tax threshold and is priced from $76,900, compared to $86,200 for the outgoing Z4 sDrive23i.

This represents a new entry price point for the BMW Z4 Roadster in Australia.

In order to harmonise prices across the range, BMW has also announced new retail prices for the Z4 sDrive35i ($107,500) and flagship Z4 sDrive35is ($120,500).

In addition to the standard 6-speed manual transmission, the Z4 sDrive20i and Z4 sDrive28i will also be available with the new 8-speed Sport Automatic Transmission which is unique in the segment.

Offering fast, smooth gear changes and excellent fuel efficiency, the new transmission also includes unidirectional gearshift paddles (utilising M shift logic).

The new BMW Z4 sDrive20i and Z4 sDrive28i will be available in Australian showrooms in November this year, whilst revised prices for the Z4 sDrive35i and Z4 sDrive35is are effective immediately.

Manufacturer’s Recommended List Prices:

Z4 sDrive20i: $76,900
Z4 sDrive28i: $89,400
Z4 sDrive35i: $107,500
Z4 sDrive35is: $120,500

*Manufacturer’s Recommended List Price is shown and includes GST and Luxury Car Tax (LCT) but excludes dealer charges, stamp duty, statutory charges and on-road charges which are additional and vary between dealers and States/Territories. Customers are advised to contact their nearest BMW dealer for all pricing inquiries.

# Glossary of key terms for editors:

The new BMW four-cylinder petrol engine is built along the same design principles as the most recent BMW six-cylinder in-line generation with BMW TwinPower Turbo technology. This straight-six engine is considered the worldwide benchmark for a super efficient six-cylinder unit. As derivatives of this engine, the new 2.0-litre four-cylinder petrol engine follows the successful six-cylinder in-line design.

  • Highly efficient TwinScroll turbocharging system: two separate exhaust gas streams, each fed by two cylinders, enter the turbocharger; direct customer benefit: faster build-up of pressure, for a very immediate response to the accelerator pedal and superlative revving ability.
  • Precisely controlled High Precision Injection with innovative solenoid valve injectors for increased efficiency.
  • Double-VANOS: infinitely variable camshaft control for the inlet and outlet valves, for higher torque at low and high revs.
  • VALVETRONIC – optimises infinitely variable inlet valve lift control.
  • All-aluminium crankcase.