Alfa Romeo 20/30 HP
The transition from A.L.F.A. to Alfa Romeo
- Power
- 49 bhp
- Top speed
- 71 mph
- Est. value
- $100k–$250k
About the Alfa Romeo 20/30 HP
The 20/30 HP was the final evolution of the original A.L.F.A. 24 HP design by Giuseppe Merosi before the company was rebranded under Nicola Romeo. Introduced in 1914, it featured a robust 4.1-litre sidevalve engine and was available in both Berlina and Torpedo body styles. Production was interrupted by World War I, with many chassis completed only after the conflict ended. It is historically significant as the bridge between the early A.L.F.A. era and the birth of the Alfa Romeo brand, eventually evolving into the 20/30 ES Sport.
Alfa Romeo 20/30 HP specs
The Alfa Romeo 20/30 HP produces 49 bhp (37 kW). It has a top speed of 71 mph (115 km/h).
| Make | Alfa Romeo |
|---|---|
| Model | 20/30 HP |
| Trim | 4.1 |
| Years | 1914–1921 |
| Type | Classic |
| Body style | Torpedo |
| Country | Italy |
| Production | About 285 built |
| Engine | 4.1-litre sidevalve inline-four |
|---|---|
| Displacement | 4,084 cc (4.1 litres) |
| Induction | Naturally aspirated |
| Power | 49 bhp (37 kW) at 2,400 rpm |
| Top speed | 71 mph (115 km/h) |
| Transmission | 4-speed manual |
| Drivetrain | Rear-wheel drive |
| Weight | 1,000 kg (2,205 lb) |
| Power-to-weight | 49 bhp per tonne |
Typical figures for the standard car; options, markets and model years vary. Where our specs come from
How much is an Alfa Romeo 20/30 HP worth?
A typical Alfa Romeo 20/30 HP is estimated to be worth $100,000 – $250,000 (about £75,000 – £186,000).
Values are directional estimates for a typical example, not appraisals. Condition, mileage, history and specification all change what a real car is worth. Pound figures use the exchange rate of 3 November 2026. How values are estimated
Alfa Romeo 20/30 HP rarity in CarSpot
The Alfa Romeo 20/30 HP is a Unicorn card in CarSpot, with a rarity score of 100 out of 100. The rarest tier: hypercars, one-offs and cars built in tiny numbers, typically fewer than about 500. A Unicorn card is worth 320 XP.
Each model's tier starts from a 0–100 score based on its value plus its power or production numbers. Once enough players have spotted a model, how often it is spotted can move it up or down one tier. How CarSpot rarity works
Rarity is a collectible game mechanic, not an assessment of real-world scarcity or value.
Alfa Romeo 20/30 HP fun facts
- The 20/30 HP was almost identical to the earlier 24 HP, but featured a sidechain on the camshaft to reduce engine noise.
- Though production began in 1914, nearly 100 chassis were stored during WWI and only completed as finished cars in 1920.
- It was one of the first cars to transition the badge from the original A.L.F.A. logo to the new Alfa Romeo branding.