Join Date: Sep 2006
Location: Burlington, Ontario
Re: My (new) 1987 Mercury Grand Marquis
A V6, eh? Any fuel economy you might save from having two less cylinders will be out the window when you put it into the 'Vic which weighs well over 5000 pounds (My '85 weighs in close to 5500 pounds). It'll be working way too hard, and may not get you up the hills. The harder an engine has to work, the more fuel it'll burn.
The 302 (5.0litre) you have now may not be a power monger, but it has plenty of torque. You'll be hard-pressed finding a stock V6 that comes anywhere close.
Lastly, if the engineers at Ford felt that a V6 would be capable of hauling around such a car, they would have offered it. The 80s were a time when everyone was opting out of large cars that had 8 cylinder engines, in favour for 6 & 4 cylinder powered cars. These cars were considerably smaller than the 'Vic. My point is, the Crown Vic was never meant to be an "economy" car. Those who purchased it were people who still wanted a large car, and could care less about fuel economy (actually, the fuel economy for the 'Vic is pretty good). You'd need a large 6 out of a truck to be able to power the Crown Vic. But again, you won't realize big fuel savings because of the size of the engine you'll need to use.