The twin clutch transmission is a semi-automatic gearbox available on the Lusso and Veloce trim levels, the two middle-range trims out of the four available with the five-door family hatchback.
The Alfa Romeo TCT is available with the 1.4-litre, 170bhp petrol engine and the 2.0-litre 170bhp diesel unit.
Petrol version s using the TCT deliver 54.3mpg and 121g/km of CO2 emissions and Alfa says this will particularly appeal to businesses because of the low Benefit-in-Kind tax associated with its green credentials.
The diesel TCT Giulietta is even more efficient with fuel economy of 60.4mpg and 119g/km of CO2 emissions – a ten per cent improvement over models fitted with the automatic gearbox.
Alfa Romeo Giulietta TCT petrol models start from £21,855 for Lusso versions and £23,155 for Veloce models. The diesel Alfa Romeo Giulietta TCT start from £23,550, rising to £24,800 for the Veloce option.
The Alfa Romeo Giulietta has been on sale in the UK for over a year since its launch as a Ford Focus-rivalling hatchback with a more upmarket interior and level of equipment.
Featuring traditionally stylish Alfa Romeo design, the Giulietta also comes with a five-star safety score from the EuroNCAP safety tests.
Alfa Romeo also enjoys a top ten position in the JD Power UK customer satisfaction survey covering everything from finance, reliability and customer service from dealerships.
The Alfa Romeo Giulietta is available now with the new TCT option from the Perrys Alfa Romeo of Amersham dealership.
Alternatively, standard Alfa Romeo Giulietta hatchback models start from just £17,755 for the Turismo trim.