New Owner with HP question.

[pmckechnie]

Just got my new 2016 Genesis sedan 3.8 base. Love it!!!!!!!!!!!!!!
It has far more power than I need but just wanted to know what the difference is between the sedan and the coupe 3.8 engines. The sedan has 311 HP and the coupe has 348 HP. The sedan uses reg fuel and the coupe uses premium fuel. Is that the only difference?
Thanks,
PauM

 

[Alwaysforward]

Weight!

 

[Mark_888]

Weight!

I don't believe that rated HP is "directly" affected by vehicle weight.

I know that when I use 50% premium and 50% regular on my Genesis V6 sedan, the engine feels more responsive, and gets about 1 MPG better fuel economy. So 100% premium fuel would make a difference, especially if the engine was tuned to take full advantage of premium.

In addition, I believe that the coupe has a different header/exhaust system that effects HP. The coupe engine may also be tuned for more HP and less torque, since it is lighter (this is where the vehicle weight indirectly can play a factor in how they tune the engine).

 

[Huddleston]

most likely ECU tuning. Many manufacturers scale back the performance capability of the cars by simply air/fuel tuning or mapping on the ECU.

Additionally what Mark_888 said regarding the exhaust system can make a noticeable difference.

Its a very common practice - tuners love it!