ALFA 15 HP

{{Infobox automobile

| name = A.L.F.A. 15 HP

| image = File:Alfa 15 HP.jpg

| caption =

| manufacturer = A.L.F.A.

| assembly = Portello, Milan, Italy

| production = 1911–1913

| body_style =

| class =

| layout = Front-engine, rear-wheel drive

| engine = 2.4 L I4

| transmission = 3-speed manual

| wheelbase = {{convert|2920|mm|in|1|abbr=on}}

| length = {{convert|3780|mm|in|1|abbr=on}}

| width = {{convert|1400|mm|in|1|abbr=on}}

| height =

| weight = {{convert|920|kg|lb|0|abbr=on}}

| predecessor = A.L.F.A 12 HP

| successor = A.L.F.A 15-20 HP

}}

The A.L.F.A 15 HP is a medium size car produced by A.L.F.A., a company that later became Alfa Romeo, from 1911 to 1913.

The model was derived from the A.L.F.A. 12 HP and had a four-cylinder engine with 2,413 cc of displacement.{{sfnp|Owen|1985|p=9}} Compared to the predecessor, the displacement was unchanged, but power output was increased. The 15-HP engine had a compression ratio of 4.2:1 and developed a maximum output of {{convert|24|hp|kW|0|abbr=on}} at 2,400 rpm. Bore and stroke were, respectively, {{convert|80|and|120|mm|in|1|abbr=on}}. It was a front-engine, rear-wheel-drive car. The 15 HP had a three-speed gearbox, and was equipped with a parking brake. The track was {{convert|1300|mm|in|1|abbr=on}}. The 15 HP was available in two types of body: torpedo and saloon. The car had a top speed of {{convert|95|km/h|mi/h|0|abbr=on}}. It was designed by Giuseppe Merosi and was priced at 9,500 lire.