1999 AC Ace vs. 2006 Audi S4
To start off, 2006 Audi S4 is newer by 7 year(s). Which means there will be less support and parts availability for 1999 AC Ace. In addition, the cost of maintenance, including insurance, on 1999 AC Ace would be higher. At 4,163 cc (8 cylinders), 2006 Audi S4 is equipped with a bigger engine. In terms of performance, 1999 AC Ace (351 HP @ 6500 RPM) has 11 more horse power than 2006 Audi S4. (340 HP @ 7000 RPM). In normal driving conditions, 1999 AC Ace should accelerate faster than 2006 Audi S4. With that said, vehicle weight also plays an important factor in acceleration. 2006 Audi S4 weights approximately 859 kg more than 1999 AC Ace.
Because 1999 AC Ace 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 1999 AC Ace. However, in wet, icy, snow, or gravel driving conditions, 2006 Audi S4, 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, 2006 Audi S4 (410 Nm @ 3500 RPM) has 10 more torque (in Nm) than 1999 AC Ace. (400 Nm @ 4000 RPM). This means 2006 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 1999 AC Ace.
Compare all specifications:
| 1999 AC Ace | 2006 Audi S4 | |
| Make | AC | Audi |
| Model | Ace | S4 |
| Year Released | 1999 | 2006 |
| Body Type | Roadster | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 3506 cc | 4163 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 351 HP | 340 HP |
| Engine RPM | 6500 RPM | 7000 RPM |
| Torque | 400 Nm | 410 Nm |
| Torque RPM | 4000 RPM | 3500 RPM |
| Engine Bore Size | 83 mm | 84.5 mm |
| Engine Stroke Size | 81 mm | 93 mm |
| Drive Type | Rear | Front |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1025 kg | 1884 kg |
| Vehicle Length | 4430 mm | 4590 mm |
| Vehicle Width | 1880 mm | 1790 mm |
| Vehicle Height | 1310 mm | 1420 mm |
| Wheelbase Size | 2480 mm | 2660 mm |
| Fuel Tank Capacity | 90 L | 63 L |
