1978 Mercury Grand Marquis vs. 1990 Porsche 928
To start off, 1990 Porsche 928 is newer by 12 year(s). Which means there will be less support and parts availability for 1978 Mercury Grand Marquis. In addition, the cost of maintenance, including insurance, on 1978 Mercury Grand Marquis would be higher. At 4,942 cc (8 cylinders), 1978 Mercury Grand Marquis is equipped with a bigger engine. In terms of performance, 1990 Porsche 928 (306 HP @ 5900 RPM) has 177 more horse power than 1978 Mercury Grand Marquis. (129 HP @ 3600 RPM) In normal driving conditions, 1990 Porsche 928 should accelerate faster than 1978 Mercury Grand Marquis. With that said, vehicle weight also plays an important factor in acceleration. 1978 Mercury Grand Marquis weights approximately 160 kg more than 1990 Porsche 928.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 1990 Porsche 928 (408 Nm @ 4100 RPM) has 105 more torque (in Nm) than 1978 Mercury Grand Marquis. (303 Nm @ 2600 RPM). This means 1990 Porsche 928 will have an easier job in driving up hills or pulling heavy equipment than 1978 Mercury Grand Marquis.
Compare all specifications:
| 1978 Mercury Grand Marquis | 1990 Porsche 928 | |
| Make | Mercury | Porsche |
| Model | Grand Marquis | 928 |
| Year Released | 1978 | 1990 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4942 cc | 4664 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | in-line |
| Horse Power | 129 HP | 306 HP |
| Engine RPM | 3600 RPM | 5900 RPM |
| Torque | 303 Nm | 408 Nm |
| Torque RPM | 2600 RPM | 4100 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1690 kg | 1530 kg |
| Vehicle Length | 5400 mm | 4450 mm |
| Vehicle Width | 1980 mm | 1840 mm |
| Vehicle Height | 1390 mm | 1290 mm |
| Wheelbase Size | 2910 mm | 2510 mm |
