BMW Z4 vs Mercedes-Benz SL63

The Z4 costs less to run, by the official figures: about $270 a year less in New Zealand, $230 in Australia, £170 in the UK and $210 in the US.

BMW Z4

Side by side

Specs are for each car's newest version. The better figure is in green.

BMW Z4Mercedes-Benz SL63

A typical year's fuel

New Zealand
$2,927 (better)
$3,202
Australia
$2,425 (better)
$2,657
United Kingdom
£1,778 (better)
£1,945
United States
$2,261 (better)
$2,474

Official figures

Uses
9.1 L/100km (better)
9.9 L/100km
UK
31 mpg (better)
29 mpg
US
26 mpg (better)
24 mpg
On a full tank
575 km
707 km (better)

Space

Seats
2
2
Boot
241 L
–
Length
4,324 mm
4,631 mm
Weight
1,470 kg
–

Engine

Engine
2.0 L 4-cylinder turbo petrol
4.0 L V8 twin-turbo petrol
Power
145 kW
430 kW (better)
Torque
320 Nm
900 Nm (better)
Gearbox
8-speed automatic
9-speed automatic
Drive
RWD
RWD

A typical year: New Zealand 11,000 km (Ministry of Transport's average for a light vehicle); Australia 11,100 km (ABS Survey of Motor Vehicle Use average); United Kingdom 11,265 km (DfT National Travel Survey average of about 7,000 miles); United States 21,726 km (FHWA average of about 13,500 miles). Real costs depend on how and where you drive. Work out a particular trip.

Z4 or SL63?

Which is cheaper to run, the BMW Z4 or the Mercedes-Benz SL63?

The BMW Z4: about $270 a year less in New Zealand, $230 in Australia, £170 in the UK and $210 in the US than the Mercedes-Benz SL63 at today's average prices and a typical year's driving.

Which uses less fuel, the BMW Z4 or the Mercedes-Benz SL63?

The BMW Z4, at 9.1 L/100km (31 mpg UK, 26 mpg US) to the Mercedes-Benz SL63's 9.9 L/100km (29 mpg UK, 24 mpg US), by their latest official figures.

Each on its own

Other comparisons

What will the drive cost?

Roadtrip works out the fuel or charging cost of any drive for your exact car, finds the cheapest stations on the way, and splits it between everyone in the car.

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The Roadtrip app showing a drive into London that costs £4.81 each, with fuel prices along the way