The Lancia Thesis (Type 841) is an executive car produced by Italian automaker Lancia between 2001 and 2009. It was available with naturally aspirated and turbocharged engines ranging between 2.0 and 3.2 litres, in both straight-5 or V6 configurations. Its appearance was based on the 1998 Diàlogos concept car. The production car premiered at the Geneva Motorshow in March 2001 and its interior was displayed for first time at the Frankfurt Motor Show. Sales started in June 2002 in Italy, with export markets following shortly after.