BMW i4 vs i5
i4 or i5? Side-by-side specifications from the original factory data: engine, power, economy, dimensions and weight.
| Parameter | i4 | i5 |
|---|---|---|
| Engine | Electricity | Electricity |
| Power, hp | 335 | 335 |
| Transmission | Automatic (A1) | Automatic (A1) |
| Drivetrain | Rear-Wheel Drive | Rear-Wheel Drive |
| Parameter | i4 | i5 |
|---|---|---|
| MPG city | 121 | 114 |
| MPG highway | 115 | 106 |
| MPG combined | 118 | 110 |
| Electric range, mi | 333 | 310 |
| Parameter | i4 | i5 |
|---|---|---|
| Length, in | 188.2 | 199.2 |
| Width, in | 72.8 | 74.8 |
| Height, in | 57.1 | 59.4 |
| Wheelbase, in | 112.6 | 118.1 |
| Parameter | i4 | i5 |
|---|---|---|
| Curb weight, lb | 4762 | — |
Figures based on official manufacturer materials. Actual values may vary by configuration and market.
What the table shows
The two columns are a 2026 i4 and a 2026 i5, taken from the specification cards behind this site rather than from a manufacturer’s press release. The starting version of a shared model year is used on both sides, so the comparison is base against base.
- Combined economy: the i4 is more economical by 8 mpg — 118 against 110, 7% more.
- Length: the i5 is longer by 11.0 in — 199.2 against 188.2, 6% more.
Identical on power (335 hp) — which is worth as much as the differences when deciding between them.
Both are fully electric. Both drive the rear wheels.
Rows the table leaves blank are figures neither card carries. Torque, acceleration and top speed are not collected by any US government source and appear on this site only where an original factory brochure printed them, so they are missing more often on recent cars than on older ones.