1991 Cadillac DeVille vs. 1978 Porsche 930
To start off, 1991 Cadillac DeVille is newer by 13 year(s). Which means there will be less support and parts availability for 1978 Porsche 930. In addition, the cost of maintenance, including insurance, on 1978 Porsche 930 would be higher. At 4,894 cc (8 cylinders), 1991 Cadillac DeVille is equipped with a bigger engine. In terms of performance, 1978 Porsche 930 (296 HP @ 5500 RPM) has 99 more horse power than 1991 Cadillac DeVille. (197 HP @ 4100 RPM) In normal driving conditions, 1978 Porsche 930 should accelerate faster than 1991 Cadillac DeVille. With that said, vehicle weight also plays an important factor in acceleration. 1991 Cadillac DeVille weights approximately 310 kg more than 1978 Porsche 930.
Because 1978 Porsche 930 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 Porsche 930. However, in wet, icy, snow, or gravel driving conditions, 1991 Cadillac DeVille, 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, 1978 Porsche 930 (440 Nm @ 4000 RPM) has 67 more torque (in Nm) than 1991 Cadillac DeVille. (373 Nm @ 3000 RPM). This means 1978 Porsche 930 will have an easier job in driving up hills or pulling heavy equipment than 1991 Cadillac DeVille. 1991 Cadillac DeVille has automatic transmission and 1978 Porsche 930 has manual transmission. 1978 Porsche 930 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 1991 Cadillac DeVille will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1991 Cadillac DeVille | 1978 Porsche 930 | |
| Make | Cadillac | Porsche |
| Model | DeVille | 930 |
| Year Released | 1991 | 1978 |
| Engine Position | Front | Rear |
| Engine Size | 4894 cc | 3298 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 197 HP | 296 HP |
| Engine RPM | 4100 RPM | 5500 RPM |
| Torque | 373 Nm | 440 Nm |
| Torque RPM | 3000 RPM | 4000 RPM |
| Engine Bore Size | 92 mm | 97 mm |
| Engine Stroke Size | 92 mm | 74.4 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 4 seats |
| Vehicle Weight | 1610 kg | 1300 kg |
| Vehicle Length | 5160 mm | 4300 mm |
| Vehicle Width | 1850 mm | 1780 mm |
| Vehicle Height | 1400 mm | 1320 mm |
| Wheelbase Size | 2820 mm | 2510 mm |
