Mercedes-Benz 540K

vs

Mercedes-Benz 300D

Germany vs West Germany — 1936 vs 1977

Mercedes-Benz 540K (1936)
Mercedes-Benz 300D (1977)
Specifications
540K Special Roadster300D W123
Horsepower180 hp88 hp
Torque380 lb-ft127 lb-ft
Engine Size5,401 cc2,998 cc
0-60 mph16.0 sec17.0 sec
Top Speed106 mph96 mph
¼ Mile20.5 sec
Weight5,071 lbs3,241 lbs
Wheelbase3,290 mm2,795 mm
Length5,290 mm4,725 mm
Units Produced4192,697,000
Original MSRP$14,000$20,300
Value (Excellent)$18,000,000$35,000
Collectibility10/106/10
Rarity10/102/10
The Verdict

The 1936 Mercedes-Benz 540K Special Roadster holds an edge across most measurable criteria, offering more power, quicker acceleration, higher top speed. That said, the 1977 Mercedes-Benz 300D W123 brings lighter weight, 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.

Overview

Within the Mercedes-Benz stable, the 1936 Mercedes-Benz 540K Special Roadster and 1977 Mercedes-Benz 300D W123 represent different approaches to performance and purpose. Both carry the Mercedes-Benz badge, yet each carves out its own distinct identity. The 1936 Mercedes-Benz 540K Special Roadster holds a clear advantage in raw power with 180 hp compared to 88 hp, a 92-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Mercedes-Benz 540K uses a Inline-8 Supercharged displacing 5,401 cc, while the Mercedes-Benz 300D relies on a Inline-5 Diesel OHC with 2,998 cc. In the sprint to 60 mph, the 1936 Mercedes-Benz 540K Special Roadster edges ahead at 16.0 seconds versus 17.0 seconds. The Mercedes-Benz 300D carries a weight advantage, tipping the scales 1830 lbs lighter. Rarity plays a significant role here — with only 419 units built, the 1936 Mercedes-Benz 540K Special Roadster is considerably scarcer than the Mercedes-Benz 300D's 2,697,000 examples. On the collector market, the 1936 Mercedes-Benz 540K Special Roadster commands a significant premium over the 1977 Mercedes-Benz 300D W123, reflecting differences in prestige and rarity. From a collectibility standpoint, the 1936 Mercedes-Benz 540K Special Roadster rates higher among enthusiasts and auction houses.