By clicking a retailer link you consent to third-party cookies that track your onward journey. This enables W? to receive an affiliate commission if you make a purchase, which supports our mission to be the UK's consumer champion.

BMWZ4 (2019-)

Sports
Petrol/Diesel/Mild hybrid
Available new

£43,933Typical price

Test score

where to buy or sell

The version of this car that we've reviewed might not be available to buy through all listed retailer links. For more options, see our guides on where to buy a car and how to sell a car.

Sign up to unlock the full expert review

The BMW Z4 is the latest in a line of two-seater convertible sports cars that dates back to the Z1 of 1989. The Z4 itself is now in its third generation and follows the familiar roadster recipe: a folding roof, rear-wheel drive and reasonable practicality. Is it all the sports car you could ever need? Find out in our full BMW Z4 review.

pros

Content has been blurred out, please log in to view.

cons

What's included?

What is it?
What's it great at?
What's it like to drive?
How reliable are BMW's cars?
How comfortable and spacious is it?
How economical is it to run?
How safe is it?
Is there anything I should look out for?
Should I buy it?

KEY TEST RESULTS
Comfort and practicality
Brand reliability 0-4 years

Dec 2024Last checked by Which?
Aug 2019First reviewed by Which?
May 2019Released

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

How we test cars

20 May 2025

Ease of driving

Overall
Visibility
Smoothness of power delivery
Driving stability
Cabin layout

How we test ease of driving

To find out how easy a car is to drive, we assess cars across a number of areas from visibility and handling to the layout of the cabin and how smoothly the engine delivers its power.

Performance

Overall
In-gear acceleration
Brakes

How we test performance

We test braking distances and whether the effectivess of the brakes fade with repeat use. Performanc is based on in-gear acceleration.

Comfort and practicality

Overall
Entry and exit
Seat comfort
Ride quality
Quietness
Seat space
Boot space (small and sports cars)

How we test comfort and practicality

Comfort and practicality includes how easy it is, or not, to get in and out of the car and the maximum height of occupants. We also measure road, wind and engine noise and assess how well the car deals with bumps from large potholes to jittery surfaces like cobble stones.

Euro NCAP

How we test euro ncap

Any car that receives a rating of two stars or less from Euro NCAP is made a Don't Buy. Any car that receives three stars can't be a Best Buy. If a car has been available for more than four years and has not been tested by Euro NCAP, it cannot be a Best Buy.

Safety kit

How we test safety kit

We factor in the safety equipment that’s factory-fitted or optional, along with how well the car protects its occupants and pedestrians in the event of an accident. We also test how easy it is to fit a variety of child car seats.

Brand reliability 0-4 years

Overall
Electric car reliability
Plug-in hybrid reliability
Petrol reliability
Diesel reliability

How we test brand reliability 0-4 years

Our reliability ratings are based on the feedback from tens of thousands of UK motorists, as collected in our annual Which? car survey. We divide all reliability feedback into three age groups: cars aged up to four years, five to nine years, and 10 to 15 years.

Brand reliability 5-9 years

Overall
Full hybrid reliability
Plug-in hybrid reliability
Diesel reliability

Brand reliability 10-15 years

Overall
Petrol reliability
Diesel reliability

General
Class	Sports
Luxury	No
Convertible	Yes
Availability	Available new
New price	£43,933 - £58,732
Fuel type	Petrol/Diesel/Mild hybrid
Tested fuel efficiency	35.3mpg
Length	4,324mm
Width (excluding wing mirrors)	1,864mm
Width (including wing mirrors)	2,030mm
Height	1,304mm
Driver max height
Boot space with seats up
Boot space with seats down
Number of seats	2
Folding rear seats	No
Isofix attachments	Yes
Turning circle	11.4 m
On sale date	01 May 2019
Lowest pence-per-mile cost	£17.25

Latest tested engine
Engine and trim name	M40i Steptronic sport
Fuel type	Petrol
Capacity and power	3-litre (340hp)
Transmission	8-speed automatic
Driven wheels	Rear-wheel-drive (RWD)
Fuel tank capacity	52 litres
Tested fuel economy: City / Out of town / Motorway (mpg)
Tested fuel economy: Combined (mpg)
Cost per mile	17.25p per mile
Cost of filling tank	£70
Monthly fuel cost
Annual fuel cost
NOx level	Extremely Low (trace)
CO level	Low
CO2 at tailpipe/tank-to-wheel (TTW) (g/km)	186
Official Euro emission level	Euro 6d-Temp
Engine test date	24 June 2019
Test programme	2017

Suggested Alternatives

BMW

M4 (2014-2019)

Sports
Petrol/Diesel/Mild hybrid
Used only

£17,191Typical price

Test score

Toyota

GR Supra (2019-2023)

Sports
Petrol/Diesel/Mild hybrid
Used only

£33,751Typical price

Test score

Mercedes-Benz

SLK (2011-2016)

Sports
Petrol/Diesel/Mild hybrid
Used only

£8,668Typical price

Test score

Best electric cars 2025
Our independent lab tests reveal the best electric cars with enough range to go the distance
How we test cars
Every car we review is subjected to hundreds of tests in our lab and on the road. Find out why you can trust our reviews, and how they help you choose the best car (and avoid the worst)
How to find cheap car insurance
Our 9-step guide to get cheaper car insurance quotes from price comparison sites and how to haggle with car insurance companies to save money

All new and used car advice

Suggested searches

BMWZ4 (2019-)

where to buy or sell