2005 Audi A6 vs. 1991 Buick Riviera
To start off, 2005 Audi A6 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 4,172 cc (8 cylinders), 2005 Audi A6 is equipped with a bigger engine. In terms of performance, 2005 Audi A6 (247 HP @ 6200 RPM) has 77 more horse power than 1991 Buick Riviera. (170 HP @ 4800 RPM). In normal driving conditions, 2005 Audi A6 should accelerate faster than 1991 Buick Riviera. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A6 weights approximately 265 kg more than 1991 Buick Riviera. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 Audi A6 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 Audi A6 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 Audi A6 (320 Nm @ 3000 RPM) has 35 more torque (in Nm) than 1991 Buick Riviera. (285 Nm @ 3200 RPM). This means 2005 Audi A6 will have an easier job in driving up hills or pulling heavy equipment than 1991 Buick Riviera.
Compare all specifications:
| 2005 Audi A6 | 1991 Buick Riviera | |
| Make | Audi | Buick |
| Model | A6 | Riviera |
| Year Released | 2005 | 1991 |
| Body Type | Station Wagon | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4172 cc | 3800 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Horse Power | 247 HP | 170 HP |
| Engine RPM | 6200 RPM | 4800 RPM |
| Torque | 320 Nm | 285 Nm |
| Torque RPM | 3000 RPM | 3200 RPM |
| Engine Bore Size | 84.5 mm | 96.5 mm |
| Engine Stroke Size | 93 mm | 86.4 mm |
| Engine Compression Ratio | 11.0:1 | 8.5:1 |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1785 kg | 1520 kg |
| Vehicle Length | 4840 mm | 5040 mm |
| Vehicle Width | 1860 mm | 1830 mm |
| Vehicle Height | 1480 mm | 1350 mm |
| Wheelbase Size | 2770 mm | 2760 mm |
