1966 Jaguar 420G vs. 1978 Mercury Grand Marquis
To start off, 1978 Mercury Grand Marquis is newer by 12 year(s). Which means there will be less support and parts availability for 1966 Jaguar 420G. In addition, the cost of maintenance, including insurance, on 1966 Jaguar 420G would be higher. At 4,942 cc (8 cylinders), 1978 Mercury Grand Marquis is equipped with a bigger engine. In terms of performance, 1966 Jaguar 420G (255 HP @ 5400 RPM) has 126 more horse power than 1978 Mercury Grand Marquis. (129 HP @ 3600 RPM). In normal driving conditions, 1966 Jaguar 420G should accelerate faster than 1978 Mercury Grand Marquis. With that said, vehicle weight also plays an important factor in acceleration. 1966 Jaguar 420G weights approximately 88 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.
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, 1966 Jaguar 420G (373 Nm @ 4000 RPM) has 70 more torque (in Nm) than 1978 Mercury Grand Marquis. (303 Nm @ 2600 RPM). This means 1966 Jaguar 420G will have an easier job in driving up hills or pulling heavy equipment than 1978 Mercury Grand Marquis.
Compare all specifications:
| 1966 Jaguar 420G | 1978 Mercury Grand Marquis | |
| Make | Jaguar | Mercury |
| Model | 420G | Grand Marquis |
| Year Released | 1966 | 1978 |
| Engine Position | Front | Front |
| Engine Size | 4235 cc | 4942 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 255 HP | 129 HP |
| Engine RPM | 5400 RPM | 3600 RPM |
| Torque | 373 Nm | 303 Nm |
| Torque RPM | 4000 RPM | 2600 RPM |
| Engine Bore Size | 92.1 mm | 101.6 mm |
| Engine Stroke Size | 106 mm | 76.2 mm |
| Drive Type | Rear | Rear |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1778 kg | 1690 kg |
| Vehicle Length | 5140 mm | 5400 mm |
| Vehicle Width | 1910 mm | 1980 mm |
| Vehicle Height | 1390 mm | 1390 mm |
| Wheelbase Size | 3050 mm | 2910 mm |
