BMW Z4 review: sports car, luxury cruiser or mini-GT? - MPG and running costs

The Z4 is a talented roadster with much in its favour, just don’t expect Boxster levels of tactility

Evo rating
  • Accurate steering, strong performance and grip
  • Not as sporting or involving as you might expect

MPG and running costs

Given the performance on offer, the Z4’s fuel economy isn’t too bad, with the 20i and 30i being the more economical models. The 20i returns 38.7 to 39.8mpg while, despite the additional performance on offer, the 30i will return 37.7 to 38.7mpg.

Unsurprisingly, the M40i is considerably thirstier with an official combined figure of 33.2mpg. Obviously, with all these figures, if you indulge in using the performance they’ll drop significantly. And given the size of the Z4’s fuel tank – a rather measly 52 litres – you could find yourself stopping for top-ups more regularly than you might like. 

Subscribe to evo magazine

Subscribe today to have every issue of evo delivered straight to you. You'll SAVE 39% on the shop price, and get evo for its original cover price for a whole year!

Insurance groups are relatively low for the Z4 – the 20i is in group 30 or 31, the 30i in 33 or 34, while the M40i is in group 37. By way of comparison, a 718 Boxster is in group 44 and the Boxster S in group 47. 

There’s a three-year warranty and a servicing package on offer, but running a Z4 shouldn’t break the bank as with extended condition-based servicing the Z4 shouldn’t need all that much in the way of attention from BMW dealers, especially as roadsters typically cover lower than average mileages. 

Advertisement - Article continues below

Most Popular

BMW M3 saloon

2020 BMW M3 tech specs revealed – choice is the word for BMW’s sports saloon

BMW’s next M3 to be available in manual or auto; with and without all-wheel drive
1 Jul 2020
Best cars

Best cars to buy for £10,000 – evo garage

The evo team picks their favourite used performance cars
1 Jul 2020
Volkswagen Tiguan SUV

New 318bhp Volkswagen Tiguan R to join Arteon R and Golf R

The popular Volkswagen Tiguan has been updated, and revealed in new R and e-hybrid forms
30 Jun 2020
Audi e-tron

New 496bhp Audi e-tron S revealed – Audi’s first high-performance EV

The Audi e-tron S has picked up an extra electric motor for a total of three in new EV flagship
1 Jul 2020