Most Diesel engines achieve peak power around 4k rpm while achieving peak torque between 2k to 4k rpm. It applies to most car manufacturers, not just Toyota. Most Diesel engines are limited to 5k rpm. This is the reason some people would say that a diesel feels quicker as peak torque is readily available at lower rpms.

For NA engines used in most small cars and crossovers, peak torque is achieved at 4k while peak power is reached at 6k rpm (just below redline). Some NA engines which have redlines of 8k rpm will have its peak power at 7k rpm. There is no point trying to eke out performance from a gas NA engine if you are scared to rev it past 3k rpm.

For turbo gas engines, peak torque is achieved between 1500 to 5k rpm depending on manufacturer. Peak power is available from 5k to 7k rpm depending on the engine. If you aim for performance, this is the best option as you get peak torque on a wider rpm band plus higher power output, not to mention the more ways to tune its ECU. Just consider Merc’s 2.0L turbo gas engine which has peak output of 415hp/500Nm, that’s a lot compared to older engines which has twice the displacement.


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