Model year changes
Several levels of trim were available depending on the market. Four trim levels namely Progression, Distinctive, Exclusive, and Turismo Internazionale (TI) were generally available. In the United Kingdom, there were three available levels of trim: Turismo, Lusso, and Turismo Internazionale (TI). Among other options, the 159 was also available with the Blue&Me infotainment system.
A Sportwagon variant was introduced at the Geneva Motor Show in March 2006. An automatic gearbox option for the 2.4 JTDM diesel model was also launched that year and later extended to other versions. In 2007, a four-wheel-drive diesel model was introduced, and the 2.4-litre diesel engines' power output was increased to 210 PS, with a newly reintroduced TI trim level also available as an option.
For the 2008 model year, the mechanics and interiors of the 159 were further developed. Dashboard, instrumentation, and other aluminium components, reduced kerb weight by 45 kg. A 3.2-litre V6 model was offered in front-wheel-drive configuration, achieving a top speed of 250 km/h. All model variants were now equipped with Alfa Romeo's electronic "Q2" limited slip differential. The revised 159 range was introduced at the Geneva Motor Show in March 2008.[9]
For the 2009 model year, Alfa Romeo introduced a turbocharged petrol engine variant badge as "TBi", this 1,742 cc unit has direct injection and variable valve timing in both inlet and exhaust cams. This new engine is rated at 200 PS and 320 Nm of torque. Eventually this unit would replace the GM derived 2.2 and 1.9 JTS units.[10] Also in the same year, a new 170 PS JTDm diesel engine became available.
The 159 was discontinued in the United Kingdom on 8 July 2011.[11]
