Originally Posted By: Trav
True but it still has all the same components as an automobile engine. The point is a gasoline engine with 1 ltr can easily make 142 hp and be reliable whether its in a frame or under the hood.
If the 4 cyl has 5 main bearings and a tough bottom end why would it have less strength than a V6 turbo like the ones used in the new Fords?
Turbo units have been used for decades reliably in 4cyl automotive engines for many hundreds of thousand of miles.
Dont disagree that turbo engines have been used for a long time reliably. My MB diesels are the epitome of longevity in a passenger car.
But the MC vs car thing still isn't quite right. You need to think of the average load over the lifecycle. It takes 10 hp to propel a 600# motorcycle 60 MPH, while it takes 60hp to propel a 3500# car. (
http://www.ajdesigner.com/phphorsepower/horsepower_equation_trap_speed_method_horsepower.php)
So the motorcycle is loaded at 7% while the Sonata is loaded at 21%. Which is going to have a higher time at temperature? Which one is going to see more stresses. It is just a matter of physics of the required load for steady state operation, let alone acceleration, hills, etc.
Couple to that two things - making 274hp from 2L means you need a LOT of boost, and, we have sludging and operational issues with cars that are far less power dense, and I still see the potential for reliability concerns, especially when the hyundai owner puts cheap oil in, does not change it often enough, etc.
There can't be too extreme marvels of engineering here... We are still dealing with physics, and I can't see a compelling reason why this engine and setup has less potential to be problemmatic than any other engine setup, including countless NA engines making far less power in far bigger packages.