"The Northstar 4.6L V-8 engine is available in two configurations: the 290-horsepower L37 and the 275-horsepower LD8 (horsepower ratings are estimated). The L37 version is a responsive, higher revving powerplant with more peak horsepower and a higher redline (6700 rpm vs. 6500 rpm). The LD8 puts more emphasis on quick launch and part-throttle response with greater peak torque."