2021 head-to-head · Subcompact Car
2021 BMW i3 Plug-in Hybrid vs Karma GS-6
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
RWD · 0.6L 2-cyl · Single-speed · 100 MPGe + 31 MPG
The 2021 BMW i3 Plug-in Hybrid is the cheaper one to run. Driving 15,000 miles a year with 18¢/kWh electricity and $3.95/gal premium gas, it costs about $948 a year to fuel (100 MPGe + 31 MPG), versus $1,496 for the 2021 Karma GS-6 (70 MPGe + 26 MPG). That's roughly $548 a year, or about $2,739 over five years.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- BMW i3 Plug-in Hybrid
- Karma GS-6
Side by side
| BMW i3 Plug-in Hybrid | Karma GS-6 | |
|---|---|---|
| $948 | Your annual fuel cost | $1,496 |
| 100 MPGe + 31 MPG | Combined efficiency | 70 MPGe + 26 MPG |
| 107 MPGe / 30 MPG | City | 71 MPGe / 27 MPG |
| 93 MPGe / 31 MPG | Highway | 69 MPGe / 25 MPG |
| 32 kWh | Electricity use (kWh/100 mi) | 48 kWh |
| 200 mi | Driving range | 330 mi |
| 126 mi | All-electric range | 61 mi |
| 84 cu ft | Passenger volume | 87 cu ft |
| 15 cu ft | Cargo volume | 5 cu ft |
| 22 g/mi | Tailpipe CO₂ (g/mi) | 70 g/mi |
| 10/10 | EPA fuel economy score | 9/10 |
| 10/10 | EPA greenhouse gas score | 10/10 |
| 7 hrs | Charge time at 240V | 6.2 hrs |
| Plug-in hybrid | Powertrain | Plug-in hybrid |
| Premium gas + electricity | Fuel | Premium gas + electricity |
| 0.6L 2-cyl | Engine / motor | 1.5L 3-cyl turbo |
| Single-speed | Transmission | Single-speed |
| RWD | Drivetrain | RWD |
✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.
BMW i3 Plug-in Hybrid vs Karma GS-6 across model years
- BMW i3 Plug-in Hybrid
- Karma GS-6
Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.
How they differ
The Karma GS-6 goes farther between stops: about 330 miles on a full tank and charge, compared with 200 miles for the BMW i3 Plug-in Hybrid.
Per EPA interior volume figures, the Karma GS-6 has more passenger space (87 vs. 84 cu ft); the BMW i3 Plug-in Hybrid has more cargo space (15 vs. 5 cu ft).
Among 34 2021 subcompact cars, the BMW i3 Plug-in Hybrid ranks 3rd and the Karma GS-6 5th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2021 BMW i3 Plug-in Hybrid or the 2021 Karma GS-6?
Measured by cost to drive, the BMW i3 Plug-in Hybrid. The BMW i3 Plug-in Hybrid is rated 100 MPGe + 31 MPG combined and the Karma GS-6 70 MPGe + 26 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2021 BMW i3 Plug-in Hybrid vs. the Karma GS-6 per year?
At 15,000 miles a year with 18¢/kWh electricity and $3.95/gal premium gas, about $948 for the BMW i3 Plug-in Hybrid and $1,496 for the Karma GS-6.
Which has more range?
The Karma GS-6: about 330 miles versus 200 miles.
Which has more cargo space?
The BMW i3 Plug-in Hybrid, with 15 cu ft of luggage volume versus 5 cu ft (EPA interior volume index).
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