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BMW Z1 2.5i 170hp

All

170 Original HP
185 Modified HP
222 Original NM
240 Modified NM
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BMW Z1

BMW Z1 All 2.5i 170hp

Key Specifications

Generazione All
Carburante Petrol
Codice motore 256K1
ECU Siemens/Continental MS42
Rapporto compressione 8.8:1
Alesaggio x Corsa 84.0 X 75.0 mm
Power 170 → 185 hp +15 hp
Torque 222 → 240 Nm +18 Nm
Power
185 HP
+15 HP (+8.8%)
Original 170 HP
Stage 1 185 HP
Torque
240 NM
+18 NM (+8.1%)
Original 222 NM
Stage 1 240 NM

Power Graph

Original Power 170HP
Original Torque 222Nm
Power After Remap 185HP
Torque After Remap 240Nm

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Frequently Asked Questions - BMW Z1

The cost of Stage 1 tuning for BMW Z1 2.5i 170hp varies depending on the ECU (Siemens/Continental MS42) and specific requirements. Contact us for a free personalized quote.

Stage 1 tuning for BMW Z1 typically takes 1-2 hours of work. Time may vary depending on the ECU type.

Yes, our Stage 1 tunes are developed respecting the engine's safety margins. The power increase from 170 to 185 HP (+9%) is within safe parameters.

With Stage 1 tuning, BMW Z1 goes from 170 HP to 185 HP (+15 HP) and from 222 Nm to 240 Nm (+18 Nm).

Stage 1 remapping takes it from 170 HP to 185 HP (+15 HP, +9%) and torque from 222 Nm to 240 Nm (+18 Nm). These figures refer to the standard engine, with no hardware modifications.

A remap changes the factory calibration, so on a vehicle still under manufacturer warranty it may affect coverage on powertrain components. Performance tuning keeps all emission systems working; deactivating emission devices such as DPF, EGR or AdBlue is not road-legal in the EU and UK and is intended for off-road, motorsport or export use only.

With a normal driving style consumption usually stays the same or drops slightly: the extra torque at low rpm means less throttle for the same speed. Consumption goes up only if you actually use the additional power.

Yes. The original file is read and stored before any modification, so the vehicle can be returned to the factory calibration at any time.

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BMW
BMW Z1 2.5i 170hp
+15 HP
185 HP