I was going to do the full year range for the GP but I couldn't come up with something concrete for the 81 - 84 model years that was "exciting" in any way.
For the 85 - 87 model years I would have had the following:
Base Grand Prix - 85 - 87
Engine: MPFI (SFI for 86 & 87) 3.8 (231) V6 (Now before you go off on any tangent about breaking rules, the technology was available on production cars albeit the FWD version of the engine.)
Transmission options: THM-200 standard, optional THM-200-4R or Borg-Warner T5
This setup would have probably netted between 120 to 150 HP depending on the year.
Grand Prix LJ - 85 - 87
Engine: 305 (5.0) V8 w TPI (LB9 - Trans Am engine)
Transmission options: THM-200 standard, optional THM-200-4R, 700-R4, or Borg-Warner T5
Between 150 to 200 HP, depending on year and EFI tech used.
Grand Prix GTO - 85 - 87
Engine: 350 (5.7) V8 w/TPI (L98 - 85 / 'Vette engine)
Transmissions: 200-4R or 700-R4 standard, Borg-Warner T5
Approximately 235 HP
I will comment on one thing.... 1985 was the prototype of the 2+2 without the aerocoupe rear window. If I were allowed to use prototype parts, then damn straight that nose would have been an option for 85!
Grand Prix 2+2 - 86 - 87
Engine: 350 (5.7) V8 w/TPI (L98 - 85 / 'Vette engine) OR 231 (3.8) V6 SFI Intercooled turbo (GN Engine)
Transmissions: 200-4R, optional Borg-Warner T5
Approximately 235 to 245 HP respectively.
For the 85 - 87 model years I would have had the following:
Base Grand Prix - 85 - 87
Engine: MPFI (SFI for 86 & 87) 3.8 (231) V6 (Now before you go off on any tangent about breaking rules, the technology was available on production cars albeit the FWD version of the engine.)
Transmission options: THM-200 standard, optional THM-200-4R or Borg-Warner T5
This setup would have probably netted between 120 to 150 HP depending on the year.
Grand Prix LJ - 85 - 87
Engine: 305 (5.0) V8 w TPI (LB9 - Trans Am engine)
Transmission options: THM-200 standard, optional THM-200-4R, 700-R4, or Borg-Warner T5
Between 150 to 200 HP, depending on year and EFI tech used.
Grand Prix GTO - 85 - 87
Engine: 350 (5.7) V8 w/TPI (L98 - 85 / 'Vette engine)
Transmissions: 200-4R or 700-R4 standard, Borg-Warner T5
Approximately 235 HP
I will comment on one thing.... 1985 was the prototype of the 2+2 without the aerocoupe rear window. If I were allowed to use prototype parts, then damn straight that nose would have been an option for 85!
Grand Prix 2+2 - 86 - 87
Engine: 350 (5.7) V8 w/TPI (L98 - 85 / 'Vette engine) OR 231 (3.8) V6 SFI Intercooled turbo (GN Engine)
Transmissions: 200-4R, optional Borg-Warner T5
Approximately 235 to 245 HP respectively.