1991 Buick Riviera vs. 2005 Porsche 911
To start off, 2005 Porsche 911 is newer by 14 year(s). Which means there will be less support and parts availability for 1991 Buick Riviera. In addition, the cost of maintenance, including insurance, on 1991 Buick Riviera would be higher. At 3,800 cc (6 cylinders), 1991 Buick Riviera is equipped with a bigger engine. In terms of performance, 2005 Porsche 911 (321 HP @ 4250 RPM) has 151 more horse power than 1991 Buick Riviera. (170 HP @ 4800 RPM) In normal driving conditions, 2005 Porsche 911 should accelerate faster than 1991 Buick Riviera. With that said, vehicle weight also plays an important factor in acceleration. 1991 Buick Riviera weights approximately 35 kg more than 2005 Porsche 911.
Because 2005 Porsche 911 is four wheel drive (4WD), it will have significant more traction and grip than 1991 Buick Riviera. In wet, icy, snow, or gravel driving conditions, 2005 Porsche 911 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, 2005 Porsche 911 (370 Nm @ 4250 RPM) has 85 more torque (in Nm) than 1991 Buick Riviera. (285 Nm @ 3200 RPM). This means 2005 Porsche 911 will have an easier job in driving up hills or pulling heavy equipment than 1991 Buick Riviera. 1991 Buick Riviera has automatic transmission and 2005 Porsche 911 has manual transmission. 2005 Porsche 911 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 1991 Buick Riviera will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1991 Buick Riviera | 2005 Porsche 911 | |
| Make | Buick | Porsche |
| Model | Riviera | 911 |
| Year Released | 1991 | 2005 |
| Body Type | Coupe | Convertible |
| Engine Position | Front | Rear |
| Engine Size | 3800 cc | 3587 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | boxer |
| Horse Power | 170 HP | 321 HP |
| Engine RPM | 4800 RPM | 4250 RPM |
| Torque | 285 Nm | 370 Nm |
| Torque RPM | 3200 RPM | 4250 RPM |
| Engine Bore Size | 96.5 mm | 96 mm |
| Engine Stroke Size | 86.4 mm | 82.8 mm |
| Engine Compression Ratio | 8.5:1 | 11.3:1 |
| Drive Type | Front | 4WD |
| Transmission Type | Automatic | Manual |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1520 kg | 1485 kg |
| Vehicle Length | 5040 mm | 4440 mm |
| Vehicle Width | 1830 mm | 1780 mm |
| Vehicle Height | 1350 mm | 1310 mm |
| Wheelbase Size | 2760 mm | 2360 mm |
