In the spring of 2005, Chrysler Group will introduce a new, beefed-up 6.1-liter 425-horsepower HEMI V8 engine in the new 2005 Chrysler 300C SRT8, the manufacturer announced this week. Preliminary performance targets for Chrysler 300C SRT8 are 0-60 mph in the low five-second range and a quarter-mile time in the high 13-second range. The 425-horsepower, naturally aspirated 6.1-liter HEMI will be the highest specific-output V8 engine ever offered by the Chrysler Group. Its 69.8 horsepower-per-liter rating exceeds even that of the legendary 1966 "Street HEMI." Torque is rated at 420 lb.-ft. Since first introducing the all-new 5.7-liter HEMI V8 engine for the 2003 model year, Chrysler Group has sold more than 469,000 vehicles with a HEMI inside.