he facelifted version of the Alfa Romeo Giulietta will receive the latest version of the Fiat Group’s JTDM diesel engine as part of a raft of modifications. The 2014 Giulietta will make its first public outing at next week’s Frankfurt motor show.

The new 2.0 JTDM uses the second-generation MultiJect injection system to deliver 150bhp and 280lb ft. Alfa Romeo claims the engine delivers best-in-class low-end torque.

The engine features Fiat Group’s third-generation common rail system, which uses a balanced hydraulic servo valve to offer a “quick and flexible” injection sequence. Injection Rate Shaping system involves two consecutive injections timed so closely that they generate a continuous and modulated fuel supply into the cylinders.

Alfa claims quieter operation and reduced particulate and nitrogen oxide emissions. The Italian marque also says the system should offer improved reliability due to a 40 per cent reduction in injector components.

The 2014 Alfa Romeo Giulietta features a new Uconnect multimedia system, which operates in conjunction with a 5in or 6.5in touchscreen. It combines navigation, audio and telephone integration and supports text-to-speech and audio streaming technology.

Minor visual tweaks include new paint colours and alloy wheel designs. Interior changes include new trim finishes and new sports seats.

The revised model will go on sale in October, with right-hand drive models arriving in January.