Our friends over at BimmerToday were able to drive the new front-wheel drive 1 Series back-to-back with the rear-drive model to compare them.
BMW 1-series (2021) review: king of the premium hatches
Is BMW Killing the 1 Series by Moving it to a FWD Architecture?
wheel spacers - BMW 1-Series Forum (F20) 135i - 1Addicts.com
Here's a comparision between the leaked F40 M135i and the current F20 M140i. Not a fan of the new one personally. : r/BMW
Side-by-side: New BMW 1 Series meets F20 1 Series M Sport
New BMW 1 Series (F40) 2021 vs. BMW 1 Series 2019 (F20) - Which one is better? (FWD vs RWD)
NEW 2019 BMW (F40) 1 Series Hatch LEAKED - BMW 2-series Gran Coupe
BMW M140i (F20) vs BMW M135i (F40) - Prestige & Performance Car
The new BMW 1 Series