New engines include a 1.8 liter direct-injection turbocharged gasoline/petrol unit with 200 bhp and a 2.0 liter diesel with 170 bhp.
Alfa Romeo's 159 range will be adding two new engines to its lineup in the U.K. market.
The first is a direct-injection 1.8 liter (1742 cc) turbocharged gasoline/petrol engine dialed up to 200 bhp and 236 lb-ft of torque (320 Nm). That will go into the Alfa Romeo 1750 TBi, named after the 1750 of old, a model considered a classic. The 16-valve engine has a CO2 emissions rating of 189 g/km.
Performance numbers for the 1750 TBi will be 7.7 seconds for the 0 to 100 km/h (0 to 62 mph) sprint and a top speed of 236 km/h (147 mph).
Also new will be the 2.0 liter JDTm diesel with 170 bhp. The engine comes with C02 emissions rating of 142 g/km and clocks the 159 in at 8.8 seconds for the 0 to 100 km/h (0 to 62 mph) run.
Both engines are Euro V compliant and Alfa Romeo will also be adding them to the Brera and Spider models as well later in the year.
The 159 will be offered with two new trim levels for the U.K. market too. The Turismo Sport trim comes with 17-inch alloy wheels, leather steering wheel, a Blue&Me in-car system and sport dials for the instrument panel.
An Elegante trim comes with a Alfatex leather finish for the cabin, a visibility package and rear sensors as a parking aide.
Prices for the 159 begin at £21,800 (24,800 euros) for the saloon/sedan and £22,900 (26,000 euros) for the wagon.