Audi SQ5 TDI 2021 UK first drive

They might not seem the most natural fit, but for the past few years, Audi has been making the combination of 'performance' and 'diesel' work for much of its S-badged line-up. And while the SQ7 and SQ8 have since swapped back to petrol power, the ever-popular SQ5 continues to drink from the black pump.

The SUV received a host of visual and tech-focused upgrades late last year to coincide with the arrival of the coupé-inspired SQ5 Sportback variant, including a more aggressive bodykit, new OLED rear lights that illuminate differently based on the active driving mode, and, inside the cabin, Audi’s latest-generation infotainment system.

More important is the mechanical overhaul, which is aimed at improving both the performance and efficiency of its V6 powertrain. Forged steel pistons have replaced the outgoing car’s aluminium ones, the intercooler air intake has been shortened and fuel injectors have been made more precise to help build boost pressure faster. The 48V mild-hybrid system’s electric compressor has also been improved to provide more torque fill while the turbocharger spools up.

Overall power is slightly down from the old car's at 336bhp, putting it at a slight disadvantage to rivals like the BMW X3 M40d, but the mammoth 516lb ft of torque is now accessible across much more of the rev range - and peak power arrives earlier, too.

As before, power is sent via an eight-speed torque-converter automatic transmission to both axles, split 40:60 front to rear, with up to 70% of drive transferable to the front or 85% to the rear, based on available traction (or lack of it). 

The SQ5 sits 30mm lower than the standard Audi Q5, although our test car did without the optional air suspension found on the pricier Vorsprung trim, riding instead on standard springs with adaptive dampers.

The powertrain improvements haven’t entirely eradicated turbo lag, and despite the huge torque output, it can’t match the instant shove of an EV, but the SQ5 still has impressive thrust. At just over two tonnes, this is no lightweight, but it’ll still see off 0-62mph in a shade over five seconds.

The gearbox also feels more responsive here than the standard Q5's seven-speed transmission, shifting quickly under its own terms, even on part-throttle and while in the less dynamic driving modes. Although the power band has been expanded, there’s still not much incentive to venture towards the upper end of the rev range, or make use of the steering wheel paddle shifters.