The M40i is based on the M Sport but adds adaptive suspension, a limited-slip differential and brakes with blue calipers, plus 19in alloy wheels.
We can’t say for sure how reliable the Z4 will be because it wasn’t in our 2023 What Car? Reliability Survey. What we do know is that BMW came 12th out of 32 manufacturers, just ahead of Mazda in 13th, and far above Porsche in 20th.
In terms of crash protection, the Z4 achieved the maximum five-star rating when it was tested by Euro NCAP in 2019. It's likely to be safer than the MX-5, which scored four stars in 2015 (the rating has now expired), but we can't compare it accurately with the Boxster because that has never been rated.
The Z4 comes packed with safety kit, including front collision warning with automatic emergency braking (AEB) and a lane-departure warning system. You can add a Driving Assistant Package for more driver aids, including a systemthat can detect traffic crossing behind you as you’re reversing on to a road, lane-keeping assistance that steers you back into line, traffic-sign recognition and adaptive cruise control.
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FAQs
The Z4 sDrive20i's top speed is 149mph, while the Z4 M40i is limited to 155mph. In terms of acceleration, thesDrive20i can officially do a0-62mph sprintin 6.6 seconds, while the M40i takesan impressive 4.5 seconds.
Our favourite version is the Z4 M40i – which is the quickest, sounds the best and is the most involving to drive. Since March 2024 the M40i has been available with a manual gearbox– and that's definitely worth having, as itmakesthe car more engaging.
The main difference is the engine under that long bonnet – the M40i gets a more powerful engine. Other than that, both are well equipped with M Sport suspension, cruise control, heated M Sport seats and parking sensors all around.
Specifications
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From £39,500
| RRP price range | £45,170 - £63,230 |
|---|---|
| Number of trims (see all) | 3 |
| Number of engines (see all) | 2 |
| Available fuel types (which is best for you?) | petrol |
| MPG range across all versions | 32.5 - 39.8 |
| Available doors options | 2 |
| Warranty | 3 years / No mileage cap |
| Company car tax at 20% (min/max) | £3,199 / £4,553 |
| Company car tax at 40% (min/max) | £6,399 / £9,106 |
| Available colours |
