It featured a 1,570 cc twin cam engine and other mechanical components shared with the Alfa Romeo Giulia and carried a 105 series chassis number,[2] but was a purpose built sports racing car, with a tubular spaceframe chassis built in the province of Perugia by SAI Ambrosini and the light all-aluminium bodywork was made by Zagato, final assembly was made Delta of Udine, with Carlo Chiti initially on board as a consultant before becoming the project leader.

The firm soon changed its name to Auto-Delta and relocated to its current site in Settimo Milanese, on the outskirts of Milan, not far from the Alfa Romeo Portello Plant.

Incorporating the research of Dr. Wunibald Kamm, the TZ used a style called coda tronca in Italian, meaning "short tail.

In order to reinforce the structure and further reduce the car's weight, Zagato replaced the light alloy body with an even more streamlined fibreglass body moulded tight to the chassis providing lower drag and reduced weight of 620 kg (1,370 lb).

The TZ2 was only built as racing version; it was equipped with an Autodelta-prepared twin plug, dry sump lubrication 1,570 cc (1.6 L; 95.8 cu in) DOHC straight-4 engine producing around 170 bhp (127 kW) at 7000 rpm.

Development of TZ cars was stopped in the end of 1965, to make room for the new Alfa Romeo GTA racing program.

The TZ2 took class win on 25 April 1965 in the 1000 km of Monza, with Bussinello-De Adamich finishing seventh overall and first in the GT 1600 category.

There were further class wins the following year: at Monza (De Adamich-Zeccoli), Sebring (Andrey-"Geki"), in the Targa Florio (Pinto-Todaro) and at the Nürburgring (Bianchi-Schultze).

The car weighs 850 kg (1,874 lb) thanks to its carbon fibre frame and hand beaten aluminium body panels and has a 420 hp (313 kW) dry sump 4.2 litre V8 engine.

The suspension setup, front and rear, are double wishbones, with pushrod actuated coil springs, and dampers from Ohlins.