1991 Audi S2 vs. 1978 Mercury Grand Marquis
To start off, 1991 Audi S2 is newer by 13 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, 1991 Audi S2 (216 HP @ 5900 RPM) has 87 more horse power than 1978 Mercury Grand Marquis. (129 HP @ 3600 RPM). In normal driving conditions, 1991 Audi S2 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 270 kg more than 1991 Audi S2.
Because 1991 Audi S2 is four wheel drive (4WD), it will have significant more traction and grip than 1978 Mercury Grand Marquis. In wet, icy, snow, or gravel driving conditions, 1991 Audi S2 will offer significantly more control. 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, 1991 Audi S2 (309 Nm @ 1950 RPM) has 6 more torque (in Nm) than 1978 Mercury Grand Marquis. (303 Nm @ 2600 RPM). This means 1991 Audi S2 will have an easier job in driving up hills or pulling heavy equipment than 1978 Mercury Grand Marquis.
Compare all specifications:
| 1991 Audi S2 | 1978 Mercury Grand Marquis | |
| Make | Audi | Mercury |
| Model | S2 | Grand Marquis |
| Year Released | 1991 | 1978 |
| Engine Position | Front | Front |
| Engine Size | 2226 cc | 4942 cc |
| Engine Cylinders | 5 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 216 HP | 129 HP |
| Engine RPM | 5900 RPM | 3600 RPM |
| Torque | 309 Nm | 303 Nm |
| Torque RPM | 1950 RPM | 2600 RPM |
| Engine Bore Size | 81.1 mm | 101.6 mm |
| Engine Stroke Size | 86.4 mm | 76.2 mm |
| Drive Type | 4WD | Rear |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1420 kg | 1690 kg |
| Vehicle Length | 4410 mm | 5400 mm |
| Vehicle Width | 1720 mm | 1980 mm |
| Vehicle Height | 1380 mm | 1390 mm |
| Wheelbase Size | 2560 mm | 2910 mm |
