MG IM6 100 Long Range vs XPENG G6 RWD Long Range in the UK: space, charging and the real quote

For a UK household deciding between two rear-drive long-range electric SUVs, the XPENG G6 RWD Long Range is the lower published OTR starting point and the easier body to fit into a narrow bay. The MG IM6 100 Long Range gives a longer manufacturer WLTP claim and a larger published rear boot. The decision changes if the current stock quote, insurance premium, luggage shape or charge stop differs from the brochure. Test both cars with your usual passengers and cargo, and compare itemised offers for the actual VINs before committing.

This is an exact-grade comparison of current UK ordering routes and manufacturer documents checked on 24 October 2026. We have not driven the two cars back to back or measured their real-world charging, luggage or energy use. Both manufacturers publish unusually high peak DC figures; neither peak tells you the time your family will spend at its regular motorway stop.

The 94 L gap between the two rear-boot claims is a reason to bring the same pram, suitcase, dog crate or work kit to both test drives. Check the height and width of the tailgate opening, floor lip, underfloor storage and rear-seat position while real passengers sit in the car. MG's 32 L front compartment could separate a cable from clean luggage, but it only helps if your own cable fits. A litre figure is not a guarantee that one particular rigid item will load.

If a garage or on-street bay is tight, the IM6's 68 mm extra published body width and 146 mm extra length matter more than a screen rendering of a parking manoeuvre. Leave room for mirrors and people to open doors; ask the XPENG dealer for the quoted car's mirror-to-mirror width. Repeat the actual approach and exit rather than assuming driver-assistance software can remove physical clearance limits.

Choose the G6 RWD Long Range for the shortlist if its smaller footprint solves a real parking problem and the delivered offer remains meaningfully below the IM6's. Confirm the actual stock car, cargo fit and local service path. Choose IM6 100 Long Range for the shortlist if its extra published luggage space and WLTP headroom change a trip you genuinely make, and if the wider body fits your parking space and the written total is worth paying. The headline 12- versus 17-minute charging estimates are secondary unless your regular CCS stops can support the cars under comparable conditions.

Get both dated quotes first. Then test the same family load and parking manoeuvre, use your own long route with a sensible arrival reserve, and collect insurance plus servicing estimates. If a dealer changes grade, model year, delivery date or offer eligibility, redo the comparison rather than carrying over another version's figures. For more UK choices, start at the UK edition.

Is 388 versus 326 miles the motorway gap? No. Those are manufacturers' WLTP combined figures for the specified Long Range grades. Neither is a same-day route test with your load, speed and weather.

Does the 451 kW peak guarantee a 12-minute stop? No. XPENG's 12-minute figure is a manufacturer estimate under suitable charging conditions. MG's 17-minute estimate is also conditional. Check the charger and actual preconditioning behaviour.

Is MG's old 0% PCP example available today? The indexed example we checked had a September registration cutoff. Ask for an October quote with all terms; we cannot carry that offer forward.

Does the IM6 definitely take more of my cargo? Its published rear boot is 665 L against XPENG's 571 L, but only loading the same items into the actual cars can settle shape, access and passenger-space tradeoffs.