De Thesis van het Italiaanse Lancia was een 4-deurs sedan en werd geleverd vanaf 2002. De bouw is sinds 2008 stopgezet.
| Type | Motor | Transmissie | Inhoud |
| 2.0 Turbo 20v Executive | benzine | handm. 6 | 2.0 liter |
| 2.0 Turbo 20v Emblema | benzine | handm. 6 | 2.0 liter |
| 2.4 20v Executive | benzine | handm. 6 | 2.4 liter |
| 2.4 20v Emblema | benzine | handm. 6 | 2.4 liter |
| 2.4 20v Executive | benzine | automaat 5 | 2.4 liter |
| 2.4 20v Emblema | benzine | automaat 5 | 2.4 liter |
| 3.0 V6 24v Emblema | benzine | automaat 5 | 3.0 liter |
| 3.2 V6 24v Emblema | benzine | automaat 5 | 3.2 liter |
| 3.2 V6 24v Elegante | benzine | automaat 5 | 3.2 liter |
| 2.4 JTD 10v Executive | diesel | handm. 6 | 2.4 liter |
| 2.4 JTD 10v Emblema | diesel | handm. 6 | 2.4 liter |
| 2.4 JTD 20v Executive | diesel | handm. 6 | 2.4 liter |
| 2.4 JTD 20v Emblema | diesel | handm. 6 | 2.4 liter |
| 2.4 JTD 20v Executive | diesel | automaat 5 | 2.4 liter |
| 2.4 JTD 20v Emblema | diesel | automaat 5 | 2.4 liter |
| 2.4 Multijet 20v Executive | diesel | automaat 5 | 2.4 liter |
| 2.4 Multijet 20v Elegante | diesel | automaat 5 | 2.4 liter |
| 2.4 Multijet 20v Emblema | diesel | automaat 5 | 2.4 liter |
| 2.4 Multijet 20v Sportiva | diesel | automaat 5 | 2.4 liter |