Quote: ChiragM What could be the reason for a relatively low rev limit for these engines? Is this to preserve the turbocharger in any way? Or is it that the makers are focusing on longevity as these downsized motors are heavily stressed anyway?A few reasons: It's not needed: Very often, turbochargers are added to engines to make them more relevant. For example, the beloved 1.8T from VAG (which came in the old Octavia RS, Audi A4, Beetle, etc.) began life in the 80s as an NA Audi engine. To pass modern emissions and make the same engine architecture more driveable, a turbocharger was added. This lowers max torque points (way more important for driving than bhp) and makes the car more efficient. As a result, there is no need to have higher revs. The 1.8T's max torque rpm went from ~3500 to ~1750, lowering gear shift points and increasing efficiency.