Costs and real consumption: BMW Z4 sDrive30i M Sport


The BMW Z4 is an all-rounder among roadsters. But what does the four-cylinder sDrive30i M Sport version, which costs at least 54,800 euros, cost in everyday driving?

The current BMW Z4 is not particularly well received by purists. They say the open two-seater is too heavy, too comfortable and not beautiful enough for a real roadster. Its buyers appreciate the Bavarian Toyota Supra counterpart for its all-round characteristics, which make it a full-size car suitable for everyday use. But what costs do drivers of the rear-wheel-drive, four-cylinder Z4 sDrive30i M Sport version face in everyday driving?

Our test consumption

The turbocharged two-liter gasoline engine is quite restrained in its drinking habits. The average consumption of 8.5 liters can be accepted in view of its 258 hp, although it should only be 7.1 liters according to the WLTP standard. This means that the fuel costs for 100 kilometers amount to 12.06 euros. However, this sum can be reduced to 8.80 euros if a Z4 driver achieves our eco consumption of only 6.2 liters. Very sporty driving, on the other hand, is expensive: It pushes consumption and fuel costs up to 10.6 liters and 15.04 euros respectively. The fuel costs are calculated on the basis of the current fuel price on our partner portal (11.02.2021 / Super: 1.419 euros/liter).

The test consumption is made up of 70% commuter and 15% each Eco and Sport.

Monthly maintenance costs

Owners of a BMW Z4 sDrive30i M Sport pay a vehicle tax of 190 euros per year. Liability insurance costs 340 euros for the same period. Those who upgrade to partial casco pay an additional 109 euros. At 592 euros, fully comprehensive insurance for the open-top Munich is disproportionately more expensive. The bottom line is monthly maintenance costs of 306 euros if the Roadster is driven 15,000 kilometers a year. If the mileage doubles, the total costs rise to 563 euros. As always, depreciation does not play a role in this analysis.

The BMW Z4 sDrive30i M Sport costs at least 54,800 euros.

How it is tested

The auto motor und sport test consumption is made up of three differently weighted consumption journeys. The so-called “commuter consumption” accounts for 70 percent. This involves a journey from home to work that measures an average of 21 kilometers. A particularly fuel-efficient 275-kilometer eco-trip accounts for 15 percent of the total. The remaining 15 percent is accounted for by the sport driving lap. The length is roughly the same as the eco lap, but the route includes a larger proportion of freeway and therefore higher speeds on average. The basis for calculating fuel costs is always the price quoted by the “mehr Tanken” portal on the day the article was written.

The monthly maintenance costs include maintenance, costs for wearing parts and vehicle taxes for an assumed annual mileage of 15,000 and 30,000 kilometers without depreciation. The calculation is based on test consumption, a three-year holding period, no-claims class SF12 for third-party and fully comprehensive insurance with Allianz including discounts for garage parkers and the restriction to certain drivers (not under 21). SF12 means a discount rate of 34 percent for liability and 28 percent for comprehensive insurance at Allianz.

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The BMW Z4 sDrive30i M Sport with 258 hp two-liter four-cylinder turbo gasoline engine costs at least 54,800 euros and consumes an average of 8.5 liters, resulting in fuel costs of 12.06 euros per 100 kilometers. Monthly maintenance costs amount to 306 euros for an annual mileage of 15,000 kilometers. If this increases to 30,000 kilometers, the total rises to 563 euros.


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