Fast 4-door under 5 sec 0-60, under $40k?

For a used 4-door under $40k that hits 60 in under 5 seconds and works as a daily driver, the Audi S4 is the better bet based on owner data. The Tesla Model 3 fits your price range, typical used prices run $19,889 to $26,486 for 2017-2026 models, but the owner data provided doesn’t include any reliability or issue details, so you can’t confirm it’s a reliable daily. Without that info, it’s a gamble.

The Audi S4’s typical used price is $16,925 to $34,160 for 2007-2023 models, so you’ll find plenty under $40k. The key is picking the right generation. Owner reports point to the B8.5 generation (circa 2013-2016) as the sweet spot. It uses a supercharged 3.0T V6 that’s proven reliable, fixes early B8 issues, and avoids the catastrophic timing chain problems of the older B6/B7 V8 models (2004-2008). The B8.5 also offers a dual-clutch automatic or manual transmission, which owners like for daily driving. Avoid the B6/B7 V8 cars entirely, owner data flags major timing issues that can total the engine.

For your situation, the B8.5 Audi S4 is the clear choice. It’s fast (0-60 in the mid-4-second range), practical with four doors and a usable trunk, and owner data confirms it’s the most reliable S4 generation. You’ll find good examples under $40k easily. Skip the Tesla Model 3 for now, without owner-reported reliability data, you can’t trust it for daily use. Stick with the B8.5 S4 and you’ll get the speed and dependability you need.