Verdict
B
BMW 1 Series — spec data and generation history.
BMW's premium hatchback. E87 (2004–2011) was rear-drive — the only RWD compact hatch ever sold in volume in the UK. F20 (2011–2019) kept rear-drive but added xDrive optional. F40 (2019–Present) switched to front-drive on the UKL2 platform shared with the X1 / Mini Countryman — controversial. M135 / M135i covered separately.
Era-to-era deltas
Click any generation for the full deep dive

130i — 265 bhp, 0-62 in 6.0s.

M140i — 340 bhp, 0-62 in 4.6s.

M135i xDrive — 306 bhp, 0-62 in 4.8s.
Common faults reported on each generation — useful when shopping the used market.