Germany vs Germany — 1990 vs 1986
| SL 500SL (R129) | M635CSi E24 | |
|---|---|---|
| Horsepower | 322 hp | 286 hp |
| Torque | 354 lb-ft | 251 lb-ft |
| Engine Size | 4,973 cc | 3,453 cc |
| 0-60 mph | 6.2 sec | 6.1 sec |
| Top Speed | 155 mph | 158 mph |
| ¼ Mile | 14.5 sec | 14.4 sec |
| Weight | 3,990 lbs | 3,461 lbs |
| Wheelbase | 2,515 mm | 2,625 mm |
| Length | 4,470 mm | 4,755 mm |
| Units Produced | 85,000 | 5,855 |
| Original MSRP | $82,500 | $54,500 |
| Value (Excellent) | $50,000 | $95,000 |
| Collectibility | 6/10 | 8/10 |
| Rarity | 3/10 | 7/10 |
The 1986 BMW M635CSi E24 emerges ahead in most objective measures, offering quicker acceleration, higher top speed, lighter weight. The 1990 Mercedes-Benz SL 500SL (R129) counters with more power, better value, but the numbers favor its rival. Still, both are remarkable machines, and the final choice often comes down to which driving experience speaks to you.
The 1990 Mercedes-Benz SL 500SL (R129) and 1986 BMW M635CSi E24 stand as two of the most notable Grand Tourer cars from Modern classic. Both emerged during a period of intense competition, and choosing between them remains a passionate debate among collectors. The 1990 Mercedes-Benz SL 500SL (R129) holds a clear advantage in raw power with 322 hp compared to 286 hp, a 36-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Mercedes-Benz SL uses a V8 DOHC 32V (M119) displacing 4,973 cc, while the BMW M635CSi relies on a Inline-6 DOHC with 3,453 cc. In the sprint to 60 mph, the 1986 BMW M635CSi E24 edges ahead at 6.1 seconds versus 6.2 seconds. The BMW M635CSi carries a weight advantage, tipping the scales 529 lbs lighter. Rarity plays a significant role here — with only 5,855 units built, the 1986 BMW M635CSi E24 is considerably scarcer than the Mercedes-Benz SL's 85,000 examples. On the collector market, the 1986 BMW M635CSi E24 commands a significant premium over the 1990 Mercedes-Benz SL 500SL (R129), reflecting differences in prestige and rarity. From a collectibility standpoint, the 1986 BMW M635CSi E24 rates higher among enthusiasts and auction houses.