In discussion of various engines, reviewers seem to get excited about higher-revving engines. Do higher revving engines deliver a unique advantage? Is there a performance advantage, or more of an audible-cosmetic advantage (sounds great)? Basically, engines with great horsepower and torque are very engaging to drive. Wouldn't the delivery of HP and torque be the criteria for judging an excellent engine, regardless of max RPM? Do higher revving engines deliver more power the faster they rev? This is generally true, but there are lower revving engines that can deliver similar HP numbers to some of the high revving engines that are discussed. Is the advantage of a higher revving engine that you get more power per unit of displacement? Thus the car can have a small, more efficient engine for normal driving, but more performance when pushed to high RPMs? As you can tell by the above, I am very curious about the dynamics of engine performance related to RPM. All the engine/car reviews that I have read that refer to higher redlines treat it as an end in itself without clearly (to me) explaining why they are better. So I thought I'd throw it out to this board to start the discussion and education.