Audi has decided to change its naming convention for all its engines to make it easier for customers to understand once electric cars are added to the mix. So what was once known as the 2.0 TDI 184 is now known as the 40 TDI. It's the same 2.0 litre turbo diesel 4 cylinder engine producing 184 horsepower and is the most powerful diesel engine available in the new A3. Due to the prodigious amount of torque, Audi fits the model with its Quattro 4 wheel drive drive-train so that it doesn't constantly spin the front wheels when pulling off the line, and allowing it to put power down more easily in poor driving conditions. It also comes with the S-Tronic automatic twin clutch gearbox as standard, and these two additions do mean it's significantly more expensive thantthe less powerful 2.0 diesel the 35 TDI model, but feels a much more complete car for it. 0-60 time is around 6.8 seconds making it fell quick, and top speed is 143 mph. The complete selection of new 2020 Audi A3 40 TDI cars is shown above, just select the car you're after to see our best prices, deals and special offers on a New 2020 Audi A3 40 TDI For Sale, either as a cash deal or with Audi low rate PCP finance.