USA vs UK — 1930 vs 1925
| V-16 Madame X | Phantom III V12 | |
|---|---|---|
| Horsepower | 165 hp | 165 hp |
| Torque | — | 350 lb-ft |
| Engine Size | 7,413 cc | 7,340 cc |
| Top Speed | 100 mph | 92 mph |
| Weight | 6,000 lbs | 5,732 lbs |
| Wheelbase | 3,734 mm | 3,810 mm |
| Length | 5,842 mm | 5,740 mm |
| Units Produced | 3,878 | 727 |
| Original MSRP | $5,350 | $15,000 |
| Value (Excellent) | $1,500,000 | $1,500,000 |
| Collectibility | 10/10 | 9/10 |
| Rarity | 10/10 | 8/10 |
This matchup is remarkably close. The 1930 Cadillac V-16 Madame X offers higher top speed, stronger collectibility, while the 1925 Rolls-Royce Phantom III V12 counters with greater rarity. Neither holds a decisive advantage, making this a true enthusiast's dilemma. Your choice ultimately depends on which driving philosophy resonates more with you.
When USA engineering meets UK craftsmanship, the result is one of the most compelling matchups in the classic car world. The 1930 Cadillac V-16 Madame X and 1925 Rolls-Royce Phantom III V12 embody their respective national automotive traditions while competing in the same arena. On paper, the two are remarkably close in power output, with the 1930 Cadillac V-16 Madame X producing 165 hp and the 1925 Rolls-Royce Phantom III V12 delivering 165 hp. Under the hood, the contrast is notable: the Cadillac V-16 uses a V16 OHV displacing 7,413 cc, while the Rolls-Royce Phantom III relies on a V12 OHV with 7,340 cc. The 1930 Cadillac V-16 Madame X claims a higher top speed at 100 mph compared to 92 mph. The Rolls-Royce Phantom III carries a weight advantage, tipping the scales 268 lbs lighter. Rarity plays a significant role here — with only 727 units built, the 1925 Rolls-Royce Phantom III V12 is considerably scarcer than the Cadillac V-16's 3,878 examples. Both trade at comparable values on the collector market, making the choice between them largely one of personal preference.