1978 Mercury Grand Marquis vs. 2005 Pontiac Bonneville
To start off, 2005 Pontiac Bonneville is newer by 27 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, 2005 Pontiac Bonneville (275 HP @ 5200 RPM) has 146 more horse power than 1978 Mercury Grand Marquis. (129 HP @ 3600 RPM) In normal driving conditions, 2005 Pontiac Bonneville should accelerate faster than 1978 Mercury Grand Marquis. With that said, vehicle weight also plays an important factor in acceleration. 2005 Pontiac Bonneville weights approximately 29 kg more than 1978 Mercury Grand Marquis. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1978 Mercury Grand Marquis is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 1978 Mercury Grand Marquis. However, in wet, icy, snow, or gravel driving conditions, 2005 Pontiac Bonneville, being front wheel drive (FWD), will offer much better control with better grip. 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, 2005 Pontiac Bonneville (407 Nm) has 104 more torque (in Nm) than 1978 Mercury Grand Marquis. (303 Nm). This means 2005 Pontiac Bonneville 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 | 2005 Pontiac Bonneville | |
| Make | Mercury | Pontiac |
| Model | Grand Marquis | Bonneville |
| Year Released | 1978 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4942 cc | 4572 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 129 HP | 275 HP |
| Engine RPM | 3600 RPM | 5200 RPM |
| Torque | 303 Nm | 407 Nm |
| Drive Type | Rear | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1690 kg | 1719 kg |
| Vehicle Length | 5400 mm | 5150 mm |
| Vehicle Width | 1980 mm | 1890 mm |
| Vehicle Height | 1390 mm | 1440 mm |
| Wheelbase Size | 2910 mm | 2860 mm |
