Efficiency of the LS1/LS6

[mattr762]

but lets be honest here as far as efficiency the US based companies are way behind european engine technology. Even the ls-6 is old school pushrod technology. BMW has been making more horsepower per cubic inch and better gas mileage than anything detroit has dreamed up.

HORSEPOWER
Acura NSX 3.2L = 290hp (17/24 mpg) 90hp/liter
BMW M3 3.2L = 333hp (16/24 mpg) 104hp/liter
Corvette Z06 5.7L = 405hp (19/28 mpg) 71hp/liter
Mustang Cobra 4.6L = 390hp (17/24 mpg) 84hp/liter
Ferrari 360 3.6L = 400hp (11/16 mpg) 111hp/liter
Jaguar XK XK8 4.2L = 294hp (17/24 mpg) 70hp/liter
Lexus SC 430 4.3L = 300hp (18/23 mpg) 69hp/liter
Lotus Esprit 3.5L = 350hp (15/22 mpg) 100hp/liter
Subaru STi 2.5L = 300hp (18/24 mpg) 120hp/liter
Maserati Coupe GT 4.2L = 390hp (11/17 mpg) 92hp/liter
Porsche 911 Turbo 3.6L = 415hp (15/22 mpg) 115hp/liter

If your talking horsepower per liter then the Subaru win hands down. Now if you look at the displacement vs torque then there are some surprizes there!

TORQUE
Acura NSX 3.2L = 224tq 70/liter
BMW M3 3.2L = 262tq 81/liter
Corvette Z06 5.7L = 400tq 70/liter
Mustang Cobra 4.6L = 390tq 84/liter
Ferrari 360 3.6L = 275tq 76/liter
Jaguar XK XK8 4.2L = 303tq 72/liter
Lexus SC 430 4.3L = 325tq 75/liter
Lotus Esprit 3.5L = 295tq 84/liter
Subaru STi 2.5L = 300tq 120/liter
Maserati Coupe GT 4.2L = 330tq 78/liter
Porsche 911 Turbo 3.6L = 415tq 115/liter

What was my point again? Oh yes, is smaller displacement that important to you? Because if it is then you should go with an STi! The LS-6 does get better gas milage than any other performance car while still making gobs of horsepower and torque.