Fiat 521
A refined six-cylinder pioneer that helped establish Fiat's reputation for upscale engineering.
- Power
- 51 bhp
- Top speed
- 57 mph
- Est. value
- $18k–$45k
About the Fiat 521
The Fiat 521 was introduced in 1928 as a larger, more powerful successor to the 520, designed to compete in the burgeoning international market for mid-to-upper class automobiles. It featured a smooth 2.5-litre side-valve inline-six engine and was offered in various body styles including the short-wheelbase 521 C and the longer 521 L. The model was significant for its mechanical refinement and was one of the first Fiats to be produced in large numbers outside of Italy, notably at the NSU-Fiat plant in Germany. Its robust chassis and reliable powertrain made it a popular choice for European coachbuilders of the era.
Fiat 521 specs
The Fiat 521 produces 51 bhp (38 kW). It has a top speed of 57 mph (92 km/h).
| Make | Fiat |
|---|---|
| Model | 521 |
| Trim | 2.5 |
| Years | 1928–1931 |
| Type | Classic |
| Body style | Saloon |
| Country | Italy |
| Production | About 33,000 built |
| Engine | 2.5-litre inline-six |
|---|---|
| Displacement | 2,516 cc (2.5 litres) |
| Induction | Naturally aspirated |
| Power | 51 bhp (38 kW) at 3,400 rpm |
| Top speed | 57 mph (92 km/h) |
| Transmission | 4-speed manual |
| Drivetrain | Rear-wheel drive |
| Weight | 1,350 kg (2,976 lb) |
| Power-to-weight | 38 bhp per tonne |
Typical figures for the standard car; options, markets and model years vary. Where our specs come from
How much is a Fiat 521 worth?
A typical Fiat 521 is estimated to be worth $18,000 – $45,000 (about £13,000 – £34,000).
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
Fiat 521 rarity in CarSpot
The Fiat 521 is an Uncommon card in CarSpot, with a rarity score of 42 out of 100. Hot hatches and premium sporty cars. An Uncommon card is worth 20 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.
Fiat 521 fun facts
- The 521 was so successful in Germany that it was produced under licence by NSU-Fiat at their Heilbronn factory.
- It featured a four-speed manual gearbox at a time when many competitors were still using three-speed units.
- Over 33,000 units were produced across all variants, making it one of the most successful six-cylinder European cars of the late 1920s.