Audi Q7 50 TDI 2021 Review Audi Q7 50 TDI 2021 Review June 23, 2021 16 / 20 There’s a lot to like about the Q7 50 TDI, but the big and muscular diesel SUV isn’t flawless Audi Q7 50 TDI quattro Quick Spin What is the 2021 Audi Q7 50 TDI all about? The 2021 Audi Q7 50 TDI quattro is a large and luxurious seven-seat SUV that sits mid-range in the Q7 line-up. The 50 TDI shares the same 3.0-litre V6 turbo-diesel powerplant and mild 48-volt electric hybrid technology with the entry-level 45 TDI, which albeit has less power and torque. The big step up in specification comes with the top-of-line SQ7 which boasts eight cylinders, three turbochargers and a dragster-like 900Nm of torque – a full 300Nm increase over the already impressive 600Nm of the 50 TDI.