GTB/GTS Turbo
From 1986 to 1989 Ferrari also produced a special home market 328 that could negate the tax concessions imposed on cars with a displacement of more than 2-litres. Designated GTB Turbo and GTS Turbo, the most fundamental changes were focused around a new engine. Displacement was 1991 cc with a bore and stroke of 66.8 mm (2.6 in) x 71 mm (2.8 in), output peaking with 254 bhp (189 kW; 258 PS) at 6500 rpm. Whereas 208 Turbo's had used KKK turbochargers, these new 328-based cars used an IHI unit running at 1.05 bars (15.2 psi) of boost.
Top speed was 157 mph (253 km/h) and 0-60 took less than 6 seconds. The only visual differences between these two-litre Turbo's and regular 328's were their NACA ducts positioned just in front of each rear wheelarch, redesigned engine covers (in order to accommodate the Behr intercooler) and a ventilated rear bumper.
Read more about this topic: Ferrari 328