I cross-shopped the Audi S5 and the BMW 435i xDrive. I primarily went with the Audi due to its higher-quality and roomier interior. Certain aspects of the BMW's interior are clearly designed to meet the price point of the 320i (which is roughly half of the price of a well-optioned 435i). The optional Dakota Leather used on the 435i seems rough and cheap. The optional Nappa Leather used on the S5 feels higher quality (I previously owned a Lexus with semi-aniline leather so my expectations are a bit high in this regard). I also feel as though I have more shoulder room in the Audi than I do in the BMW.
I much prefer the appearance of the Audi S5, and I feel that it will age well over time. IMO, Audi has done a better job distinguishing the A4 and A5 in styling. The 4 Series, on the other hand, looks like a two-door 3 Series with a little bit of extra width. I'm not a fan of a few of the styling elements of the 4-Series such as the cheesy-looking fender vent which is only available in a contrasting black or chrome depending on the trim selected.
Drivetrain-wise, I would be fairly happy with either one. The 335i's 3.0 liter I6 turbo engine has pretty good response even with the turbocharger (I assume this is due to the turbocharger's unique design). Only in comparison to the immediacy of the 3.0 liter V6 supercharged engine of the S5 are any deficiencies noted. The Audi's supercharger creates an engine which feels like it's of a higher displacement. The BMW's ZF eight-speed transmission is among the best automatic transmissions out there. The Audi S tronic is probably the only transmission on the market I'd rather have over it since it's a dual clutch design.
Infotainment-wise, I prefer the 435i's iDrive interface to the S5's MMI. It feels more up to date. I think both systems are acceptable, however.
Honestly, if the Audi S5 didn't exist, I'd own a BMW 435i xDrive instead. I thought the same things other have: The Audi is such an old platform, it must be behind the times. This does show up in a few missing features like the automated parking, head-up display, and side and top view cameras found in the BMW. One more thing, the 435i will lease for significantly less money than the S5 since BMW leases are heavily subsidized. Despite this, I still feel the S5 offered more of what I deemed important than the 435i. At the time, I felt as though if I had bought a 435i I'd always wish that I would have purchased the S5 instead. Having actually purchased the S5, I don't feel like I made the wrong decision. The biggest competitor to the 2015 Audi S5, in my mind, is the 2016 Audi S5. Still, I wouldn't fault anyone for choosing a BMW 435i instead.
Bookmarks