G15 · 2018 on · B57 twin turbo

BMW 840d xDrive Stage 1 Remap

BMW’s big diesel grand tourer. The 840d covers serious distances easily, and a custom map adds performance to match its looks.

400bhpPower · from 320

800NmTorque · from 680

£449Stage 1 · inc VAT

Book Stage 1 £449How it drives

840d on the road

How a remapped 840d drives

+120Nm

Grand tourer, grander pace

800Nm makes the 840d feel far more urgent than its diesel badge suggests, without giving up its long legs.

+80bhp

Out of every bend

xDrive and the extra power fire the 840d out of corners with no fuss at all.

590lb-ft

Long legs

Hundreds of miles in a day feel easy in the 840d, and there’s always a strong surge left for the last stretch home.

840d Stage 1 figures

From 320 to 400bhp

Typical figures for a G15 840d on Stage 1.

Power320400bhp+80 bhp · +25%

Torque680800Nm+120 Nm · +18%

399.1bhp on our dyno

The 840d shares its B57 twin turbo with a customer BMW 740d xDrive we mapped: 312.7 to 399.1bhp and 679 to 808Nm, measured on our rollers. See that dyno sheet

840d remap price

Your 840d, priced

Stage 1

£449inc VAT

Around 400bhp and 800Nm for your 840d.

Book Stage 1

Stage 1 + xHP Most popular

£709save £125

The 840d engine and its ZF8, tuned together with xHP.

Book Engine + Gearbox

Prices include VAT · Finance available

The G15

About the G15 840d

The 840d xDrive is the diesel 8 Series: a big, fast grand tourer with the twin-turbo B57. It covers huge distances easily, and a custom map adds a real dose of performance to match the way it looks.

Engine: B57 twin turbo, 2993cc
Chassis: G15 · 2018 on
After Stage 1: 400bhp · 800Nm · 590 lb-ft
Gearbox: ZF 8-speed automatic
ECU: Bosch MD1CP032
Locked ECU?: Cars built from around June 2020 · £100 same-day unlock · check yours

Questions

840d remap questions

How much bhp does a BMW 840d xDrive remap add?

A G15 840d goes from 320bhp and 680Nm to around 400bhp and 800Nm on Stage 1: 80 more horsepower and 120Nm more torque.

Do you tune the 840d Gran Coupe and Convertible?

Yes, where they share the same B57. Check your reg to confirm your car and its figures.

Will the 840d still be refined?

Yes. The map adds pull without changing how smooth and quiet it is at a cruise.

Will a remap change how the 840d sounds?

No. The exhaust and the sound stay exactly as BMW made them. What you notice is the pull, which arrives earlier and keeps going for longer.

Your 840d, at 400bhp.

For G15 840d cars, 2018 on. Same day, on our dyno in Warrington.

Book Stage 1 £449Call 01925 819002