All-turbo range for Z4

BMW has replaced the Z4’s venerable naturally-aspirated six cylinder engines with turbocharged four-cylinder units, accompanied by massive price cuts across the range.

Replacing the 150kW/250Nm 2.5-litre sDrive23i is a new sDrive20i variant, which runs BMW’s fresh N20 2.0-litre twin-scroll turbocharged four and produces a little less power (135kW) but more torque (270Nm). Priced at $76,900, buyers will save $10K over the outgoing base six, thanks partly to the new four’s eligibility for a reduced Luxury Car Tax rate, as the new turbo four slurps less than 7L/100km (6.7L/100km, a 1.8L improvement on 23i).

A high-boost version of the same engine is available in the sDrive28i, with outputs of 180kW and 350Nm, or 10kW less and 40Nm more than the outgoing 3.0-litre sDrive30i. 0-100km/h is a claimed 5.7 seconds. Despite the extra grunt, the combined consumption for the 28i is identical to the 20i variant. A full $9K is saved over the 30i, with the new 28i priced at $89,400.

Both new variants are standard with a six-speed manual transmission; a new eight-speed auto is optional.

Although the flagship turbo-six sDrive35i and sDrive35is carry on unchanged, both variants also receive price cuts in line with the new turbo four variants – tags are now $107,500 and $120,500, respectively.

BMW says the reason the flagship Z4 variants get a slashed sticker is to “harmonise prices across the range”. But surely it wouldn’t have anything to do with a new Mercedes SLK that’s just arrived on the scene, would it?

We're giving away the last great Aussie Holden V8! Enter here for your chance to win!

Sign up here to receive the latest round-up of Wheels news, reviews and video highlights straight to your inbox each week.