Lancia Dialfa

{{Single source|date=January 2019}}{{Infobox automobile

| image = 1908 Lancia Dialfa driver.jpg

| name = Lancia Dialfa

| aka = Lancia Dialfa-18HP

| manufacturer = Lancia

| body_style = 4-door cabriolet

| layout = FR layout

| engine = 3815 cc straight-6 40 hp

| production = 1908

| predecessor =

| successor = Lancia Beta

| wheelbase={{convert|324|cm|in|1|abbr=on}}

| related =

| class =

| transmission=4-speed manual

| weight={{convert|750|kg|lb|0|abbr=on}}

| parent_company =

}}

The Lancia 18/24 HP Dialfa was the second model built by Lancia, produced in 1908. The car was based on the four cylinder Lancia Alfa, now with a straight-6 engine. With 40 hp, it could achieve a top speed of {{convert|110|km/h|mi/h|abbr=on}}. Only 23 examples were built, all in 1908.