Regal LS and GS performance
The 3800 Series II L67 Supercharged engine in a 1998 GS.
The Regal LS from the factory had a 1/4 mile (~400 m) elapsed time (ET) of 15.8 seconds and could do 0-60 mph in under 8 seconds. The supercharged Regal GS had a 1/4 mile ET of 14.7 seconds, and acceleration to 60 mph (100 km/h) took only 6.6 seconds.[5] The Regal GS, equipped with the supercharged 3.8 liter V6 engine (L67) produced 240 hp (180 kW) & 280 ft·lbf (380 N·m) of torque. The Regal GS's PCM has programming that activates torque management to reduce wheel spin at launch. The Regal LS was EPA rated at 19/30 MPG city/freeway while the supercharged Regal GS was EPA rated at 18/27 MPG city/freeway.