2.0 INGENIUM Petrol P200 to P250 Factory Upgrade

Product Code: LR-RETRO-P200-P250-20 | Vehicle: Land Rover Discovery Sport (L550), Range Rover Evoque (L538/L551), Range Rover Velar (L560) | Engine: 2.0L AJ200 INGENIUM I4 Petrol Turbo

Welcome to the definitive JLR technical guide for upgrading your 2.0L INGENIUM petrol engine from P200 to full P250 factory specification. The P200 and P250 variants of the AJ200-series engine share the same short block and cylinder head but differ in turbocharger specification, intercooler size, and ECU calibration. Our upgrade provides a complete conversion package: turbocharger, intercooler, and ECU calibration to match the exact factory P250 powertrain configuration used by Land Rover across the Discovery Sport, Evoque, and Velar model lines.

Performance Comparison: P200 vs P250 (Factory Spec)

* 0-100 km/h times vary by vehicle variant and drivetrain; shown for Discovery Sport 4WD automatic.

What is the Difference Between 2.0 INGENIUM P200 and P250?

The P250 is not a “tuned” P200; it is a separate engine variant with a larger turbocharger (higher flow turbine housing and electronic wastegate), a larger intercooler, and a factory ECU calibration that increases boost by 0.3 bar and extends the fuel injection window. The P200's smaller turbo would experience turbine inlet temperatures exceeding 950°C if asked to deliver 250 hp, risking material failure of the Inconel wheel. The lower intercooler volume on the P200 also leads to higher intake air temperatures (IAT) above 65°C when power is pushed past 220 hp, which causes the ECU to pull timing. Our upgrade eliminates both bottlenecks.

Upgrade Process: JLR Technical Workflow

1. Vehicle Assessment: We verify the engine code (AJ200P200 vs AJ200P250) via the VIN or OBD read. We check that the vehicle does not already have a factory P250 ECU (some late models may have been misidentified).
2. Hardware Removal:
   • Remove the front bumper assembly and release the charge air cooler ducts.
   • Remove the original P200 intercooler and replace with the larger P250 intercooler (brackets, hoses, and clamps included).
   • Remove the P200 turbocharger (requires exhaust manifold removal). Replace with the P250 turbocharger. New gaskets, oil feed pipe, and coolant return pipe supplied.
3. ECU Read and Calibration: Using a BDM interface or TC1793 boot mode, we read the Bosch MG1CS001 ECU. We then apply the factory P250 calibration maps, including:
   • Boost pressure target table (increased by 0.2–0.3 bar across the operating range)
   • Wastegate duty cycle map (adapted for the electronic actuator)
   • Fuel injection duration map (extended by 15% at full load)
   • Ignition timing map (retarded slightly at high boost to prevent knock, then advanced at mid-load for torque)
   • Torque limiter map (increased to 400 Nm for transmission protection – the ZF 9HP48 is rated for 480 Nm)
4. Hardware Installation: The intercooler and turbo are installed. All gaskets, O-rings, and seals are replaced with OEM-grade parts. We also recommend replacing the spark plugs (same NGK DILKAR7A10) if overdue.
5. Validation: We perform a road test with live data logging (boost pressure, IAT, lambda, knock sensor activity, EGT). We confirm the calibration stays within JLR safety margins: peak cylinder pressure < 120 bar, EGT < 850°C, no knock events above -2° retard.

Why Choose LR-Retrofit for Your P200 to P250 Conversion?

• Complete Hardware + Software Package: We provide the P250 turbocharger, intercooler, all required gaskets, and the ECU calibration as a single kit. No sourcing of used parts.
• Factory-Spec Calibration: Our calibration is derived from genuine JLR P250 factory files (model year 2018+), ensuring OEM drivability, cold-start behaviour, and emissions compliance (EU6d).
• Transmission Protection: We calibrate the torque limiter to 400 Nm for the ZF 9HP48 transmission (factory P250 torques are 365 Nm). This protects the torque converter clutch from excessive slip.
• Vehicle-Specific: We differentiate between Discovery Sport (L550), Evoque (L538/L551), and Velar (L560) calibrations due to differences in vehicle inertia, gearbox mapping, and cooling fan control.
• No Check Engine Lights: We disable any DTCs related to the turbocharger swap (e.g., wastegate position sensor mismatch, boost pressure plausibility). The conversion operates as a true factory SD4 (petrol equivalent).