Italy vs West Germany — 1963 vs 1971
| 2500 GT Allemano Coupe | 350 SL / 450 SL R107 450 SL | |
|---|---|---|
| Horsepower | 245 hp | 225 hp |
| Torque | 188 lb-ft | 278 lb-ft |
| Engine Size | 2,467 cc | 4,520 cc |
| 0-60 mph | 6.5 sec | 8.8 sec |
| Top Speed | 155 mph | 130 mph |
| ¼ Mile | 14.8 sec | 16.5 sec |
| Weight | 2,072 lbs | 3,505 lbs |
| Wheelbase | 2,350 mm | 2,460 mm |
| Length | 4,090 mm | 4,390 mm |
| Units Produced | 12 | 237,287 |
| Original MSRP | — | $17,660 |
| Value (Excellent) | $1,500,000 | $80,000 |
| Collectibility | 10/10 | 7/10 |
| Rarity | 10/10 | 3/10 |
The 1963 ATS 2500 GT Allemano Coupe holds an edge across most measurable criteria, offering quicker acceleration, higher top speed, lighter weight. That said, the 1971 Mercedes-Benz 350 SL / 450 SL R107 450 SL brings better value and remains a compelling choice for enthusiasts who value Mercedes-Benz heritage. The right pick depends on whether you prioritize specifications or the intangible qualities that make a car truly special.
Putting the 1963 ATS 2500 GT Allemano Coupe against the 1971 Mercedes-Benz 350 SL / 450 SL R107 450 SL is a comparison that enthusiasts have debated for decades. Each car reflects distinct design philosophies shaped by different automotive cultures — Italy versus West Germany. The 1963 ATS 2500 GT Allemano Coupe holds a clear advantage in raw power with 245 hp compared to 225 hp, a 20-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the ATS 2500 GT uses a V8 DOHC displacing 2,467 cc, while the Mercedes-Benz 350 SL / 450 SL relies on a V8 SOHC with 4,520 cc. In the sprint to 60 mph, the 1963 ATS 2500 GT Allemano Coupe edges ahead at 6.5 seconds versus 8.8 seconds. The ATS 2500 GT carries a weight advantage, tipping the scales 1433 lbs lighter. Rarity plays a significant role here — with only 12 units built, the 1963 ATS 2500 GT Allemano Coupe is considerably scarcer than the Mercedes-Benz 350 SL / 450 SL's 237,287 examples. On the collector market, the 1963 ATS 2500 GT Allemano Coupe commands a significant premium over the 1971 Mercedes-Benz 350 SL / 450 SL R107 450 SL, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1963 ATS 2500 GT Allemano Coupe rates higher among enthusiasts and auction houses.