Jaguar SS100

vs

Riley MPH

UK vs United Kingdom — 1938 vs 1934

Jaguar SS100 (1938)
Riley MPH (1934)
Specifications
SS100 3.5 Litre RoadsterMPH Standard
Horsepower125 hp70 hp
Torque170 lb-ft
Engine Size3,485 cc1,496 cc
0-60 mph10.4 sec
Top Speed100 mph90 mph
Weight2,632 lbs2,016 lbs
Wheelbase2,667 mm2,591 mm
Length3,962 mm3,962 mm
Units Produced11815
Value (Excellent)$750,000$1,000,000
Collectibility10/1010/10
Rarity9/1010/10
The Verdict

Two outstanding machines, each with compelling strengths. The 1938 Jaguar SS100 3.5 Litre Roadster excels in more power, higher top speed, while the 1934 Riley MPH Standard stands out for lighter weight, greater rarity. The best advice? Drive both if you can, then follow your instincts.

Overview

Putting the 1938 Jaguar SS100 3.5 Litre Roadster against the 1934 Riley MPH Standard is a comparison that enthusiasts have debated for decades. Each car reflects distinct design philosophies shaped by different automotive cultures — UK versus United Kingdom. The 1938 Jaguar SS100 3.5 Litre Roadster holds a clear advantage in raw power with 125 hp compared to 70 hp, a 55-horsepower difference that shapes the driving experience. Under the hood, the contrast is notable: the Jaguar SS100 uses a Inline-6 OHV displacing 3,485 cc, while the Riley MPH relies on a Inline-4 OHV (Twin-Cam, Riley) with 1,496 cc. The 1938 Jaguar SS100 3.5 Litre Roadster claims a higher top speed at 100 mph compared to 90 mph. The Riley MPH carries a weight advantage, tipping the scales 616 lbs lighter. Rarity plays a significant role here — with only 15 units built, the 1934 Riley MPH Standard is considerably scarcer than the Jaguar SS100's 118 examples. Both trade at comparable values on the collector market, making the choice between them largely one of personal preference.