D165 to D200 Upgrade – Land Rover Defender L663 OEM Calibration
Technical Upgrade Overview
Verified D165 → D200 Performance Gains
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Power Output: Upgrades from 165 PS to full factory 200 PS @ 4000 rpm. This delivers stronger acceleration and highway response.
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Torque Improvement: Raises torque from stock output to 500 Nm. Moreover, it optimises delivery across 1250–2500 rpm for improved low-end pull.
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Throttle Response: Refines factory throttle mapping. Thus, it eliminates flat spots and delivers linear, predictable power delivery.
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Drivetrain Optimisation: Matches D200 shift logic for the 8-speed automatic transmission. Consequently, gear changes become smoother and more responsive.




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