2009 Audi A6 vs. 1991 Porsche 928
To start off, 2009 Audi A6 is newer by 18 year(s). Which means there will be less support and parts availability for 1991 Porsche 928. In addition, the cost of maintenance, including insurance, on 1991 Porsche 928 would be higher. At 4,663 cc (8 cylinders), 1991 Porsche 928 is equipped with a bigger engine. In terms of performance, 2009 Audi A6 (350 HP @ 6800 RPM) has 44 more horse power than 1991 Porsche 928. (306 HP @ 5900 RPM). In normal driving conditions, 2009 Audi A6 should accelerate faster than 1991 Porsche 928.
Because 2009 Audi A6 is four wheel drive (4WD), it will have significant more traction and grip than 1991 Porsche 928. In wet, icy, snow, or gravel driving conditions, 2009 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, 2009 Audi A6 (441 Nm @ 3500 RPM) has 33 more torque (in Nm) than 1991 Porsche 928. (408 Nm @ 4100 RPM). This means 2009 Audi A6 will have an easier job in driving up hills or pulling heavy equipment than 1991 Porsche 928. 2009 Audi A6 has automatic transmission and 1991 Porsche 928 has manual transmission. 1991 Porsche 928 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 Audi A6 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2009 Audi A6 | 1991 Porsche 928 | |
| Make | Audi | Porsche |
| Model | A6 | 928 |
| Year Released | 2009 | 1991 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 4663 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 350 HP | 306 HP |
| Engine RPM | 6800 RPM | 5900 RPM |
| Torque | 441 Nm | 408 Nm |
| Torque RPM | 3500 RPM | 4100 RPM |
| Engine Bore Size | 84.5 mm | 97 mm |
| Engine Stroke Size | 92.8 mm | 78.9 mm |
| Engine Compression Ratio | 12.5:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Length | 4930 mm | 4530 mm |
| Vehicle Width | 2040 mm | 2060 mm |
| Vehicle Height | 1460 mm | 1290 mm |
| Wheelbase Size | 2850 mm | 2510 mm |
| Fuel Tank Capacity | 80 L | 76 L |
