I think my 2000 Grand Marquis was over 2 seconds slower than my 97 Cougar. I am at 2800 ft elevation, and I know that in my 2000 Grand Marquis I wouldn't have been driving fast enough at the end of the 1/4 mile to get a ticket from most state patrollers on the interstate. That is nPI, single exhaust, 2.73 gears, and 200k+ miles. (97 Cougar had PI intake, 3.27 gears, premium tune).
I am looking for my timeslips now for the Grand Marquis to post the actual times.
97 Mark VIII LSC/Silver/Gray leather
97 Cougar 4.6 Sport/White Opalescent Tricoat Metallic /Gray leather down but not out?
89 Cougar LS 3.8/Oxford White/Gray velour/HG need replaced AGAIN
00 Grand Marquis LS/Vibrant White/Gray velour
63 Falcon 302/black and rust/shed isn't moving
82 F-150/Oxford White/dumb VV carb doesn't pass emissions