Germany vs Germany — 2003 vs 1984
| RS6 C5 Avant | Sport Quattro S1 | |
|---|---|---|
| Horsepower | 450 hp | 306 hp |
| Torque | 413 lb-ft | 258 lb-ft |
| Engine Size | 4,172 cc | 2,133 cc |
| 0-60 mph | 4.4 sec | 4.8 sec |
| Top Speed | 155 mph | 155 mph |
| ¼ Mile | 12.9 sec | 13.2 sec |
| Weight | 4,266 lbs | 2,866 lbs |
| Wheelbase | 2,760 mm | 2,224 mm |
| Length | 4,843 mm | 4,240 mm |
| Units Produced | 4,315 | 214 |
| Original MSRP | $84,900 | $110,000 |
| Value (Excellent) | $65,000 | $800,000 |
| Collectibility | 8/10 | 10/10 |
| Rarity | 7/10 | 10/10 |
It's a closely fought contest. The 2003 Audi RS6 C5 Avant brings more power, quicker acceleration, better value to the table, and the 1984 Audi Sport Quattro S1 answers with lighter weight, greater rarity, stronger collectibility. Both are excellent machines that reward their owners in different ways — there's no wrong answer here.
Audi has long offered a diverse lineup, and comparing the 2003 Audi RS6 C5 Avant with the 1984 Audi Sport Quattro S1 highlights the breadth of the marque's engineering philosophy. The 2003 Audi RS6 C5 Avant holds a clear advantage in raw power with 450 hp compared to 306 hp, a 144-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Audi RS6 uses a V8 DOHC 32V Twin-Turbo displacing 4,172 cc, while the Audi Sport Quattro relies on a Inline-5 with 2,133 cc. In the sprint to 60 mph, the 2003 Audi RS6 C5 Avant edges ahead at 4.4 seconds versus 4.8 seconds. The Audi Sport Quattro carries a weight advantage, tipping the scales 1400 lbs lighter. Rarity plays a significant role here — with only 214 units built, the 1984 Audi Sport Quattro S1 is considerably scarcer than the Audi RS6's 4,315 examples. On the collector market, the 1984 Audi Sport Quattro S1 commands a significant premium over the 2003 Audi RS6 C5 Avant, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1984 Audi Sport Quattro S1 rates higher among enthusiasts and auction houses.