NAF EV Range Test 2026: BMW iX3 Goes Furthest, Xpeng X9 Steals the Show

Why It Matters

The results validate WLTP as a reliable summer benchmark and highlight which manufacturers are honest about range, a key factor for consumer confidence and EV adoption.

Key Takeaways

• BMW iX3 50 xDrive achieved 781 km, beating WLTP by 1.5%
• Xpeng X9 exceeded its WLTP range by 11.4%, highest positive deviation
• Most EVs stayed within ±6% of WLTP in favorable summer conditions
• MG IM6 missed WLTP by 11.7%, the largest negative deviation
• Winter tests show range can drop 20‑30% versus summer figures

Pulse Analysis

The NAF El Prix summer test remains the industry’s most transparent real‑world range benchmark, and the 2026 edition reinforced its credibility. By starting each vehicle at a full charge and driving to absolute zero under mild, dry conditions, the test isolates the gap between laboratory WLTP numbers and everyday performance. BMW’s iX3 50 xDrive not only led the pack with 781 km but also nudged past its WLTP claim, signalling that the new Neue Klasse platform delivers both efficiency and a modest buffer for drivers.

Xpeng’s X9 emerged as the most honest model, outpacing its WLTP rating by 11.4%. This mirrors the brand’s 2023 performance with the G9, suggesting a deliberate strategy of conservative range estimates that builds buyer trust. For manufacturers, such positive deviations can become a marketing advantage, while negative outliers like the MG IM6, which fell 11.7% short, underscore the risk of over‑promising. The broader data set showed that 20 of the 24 cars remained within a ±6% range band, confirming that WLTP figures are generally dependable in optimal summer weather.

For prospective EV owners, the summer test offers a realistic baseline, but it’s only part of the picture. Independent studies and NAF’s own winter results reveal that cold temperatures can shave 20‑30% off advertised ranges, especially at higher speeds. Buyers should therefore factor in regional climate, typical driving patterns, and the specific deviation history of each model. As range anxiety eases with more accurate benchmarks, manufacturers that consistently exceed WLTP numbers are likely to gain a competitive edge in the rapidly expanding electric market.