With just six days to go to the Paris motor show, the 'leaks' are coming think and fast; today sees the official release of the all-new Audi S3 - and we do mean all new.
The only thing its long-stroke two-litre TFSI engine has in common with the previous model is its 82.5 x 92.8mm bore and stroke. Developed specifically for the S3, it has upgraded pistons and con rods, a grey cast-iron crankcase reinforced at the main bearing seats, and a new cylinder head made of a lightweight aluminum-silicon alloy.
The exhaust manifold is part of the head, and is cooled by the water jacket - which not only keeps the larger-than-before, 1.2-bar turbo cool at full throttle (so it can run leaner and save fuel) but also reduces fuel consumption during warm-up.
The new TFSI engine has both direct and indirect fuel-injection; it relies on direct injection for starting and at high revs but uses indirect injection at part load to reduce consumption and emissions.
The only thing its long-stroke two-litre TFSI engine has in common with the previous model is its 82.5 x 92.8mm bore and stroke. Developed specifically for the S3, it has upgraded pistons and con rods, a grey cast-iron crankcase reinforced at the main bearing seats, and a new cylinder head made of a lightweight aluminum-silicon alloy.
The exhaust manifold is part of the head, and is cooled by the water jacket - which not only keeps the larger-than-before, 1.2-bar turbo cool at full throttle (so it can run leaner and save fuel) but also reduces fuel consumption during warm-up.
The new TFSI engine has both direct and indirect fuel-injection; it relies on direct injection for starting and at high revs but uses indirect injection at part load to reduce consumption and emissions.
