Data shown is approximate and based on publicly available specifications and real-world estimates. Actual performance varies with driving conditions, temperature, state of charge, and charger hardware. Always check your vehicle's manual for official specifications. EVcourse is not affiliated with any vehicle manufacturer.
Quick verdict
The Audi Q4 e-tron has a higher peak charging speed at 175 kW DC, but the Smart #3 actually finishes the 10-80% charge faster (28 min vs 28 min) thanks to its smaller battery. The Smart #3 is more efficient at 175 Wh/km. The Audi Q4 e-tron offers more WLTP rated range at 562 km.
Side-by-Side Specs
| Spec | Audi Q4 e-tron | Smart #3 |
|---|---|---|
| Battery (approx.) | ~77 kWh | ~62 kWh |
| WLTP range (rated) | ~562 km | ~415 km |
| Efficiency (approx.) | ~179 Wh/km | ~175 Wh/km |
| Max DC charging | up to 175 kW | up to 150 kW |
| 10-80% charge time (approx.) | ~28 min | ~28 min |
| Max AC charging | up to 11 kW | up to 22 kW |
| DC connector | CCS2 | CCS2 |
Charging Speed
The Audi Q4 e-tron has a peak DC charging speed of 175 kW, which is roughly 17% faster than the Smart #3 at 150 kW. In practice, peak speed only tells part of the story. The charging curve, battery temperature, and state of charge all affect how quickly your car actually charges.
For the 10-80% charge (the most common DC fast charging scenario), the Smart #3 finishes in about 28 minutes, roughly matching the Audi Q4 e-tron. On a road trip, that difference adds up over multiple stops.
Range and Efficiency
The Audi Q4 e-tron has a WLTP rated range of approximately 562 km, which is roughly 147 km more than the Smart #3 at approximately 415 km. WLTP is a standardized lab test. Expect your actual range to be lower, varying with speed, weather, terrain, and driving style.
Efficiency matters more than battery size for daily driving costs. The Smart #3 consumes 175 Wh/km, compared to 179 Wh/km for the Audi Q4 e-tron. That means the Smart #3 uses less energy per kilometer, which translates to lower charging costs and fewer charging stops on longer drives.
A more efficient car does not always mean more range. Battery size plays a role too. The Audi Q4 e-tron has approximately 77 kWh of useable battery , while the Smart #3 has approximately 62 kWh.
Which One Should You Choose?
The Audi Q4 e-tron has the higher peak DC speed at up to 175 kW, but the Smart #3 actually finishes the 10-80% charge faster at approximately 28 minutes versus approximately 28 minutes. That is because the Smart #3 has a smaller battery to fill. On road trips, time at the plug matters more than peak power.
For AC charging (home wallboxes, workplace chargers, and public street chargers), the Smart #3 supports up to 22 kW, compared to 11 kW for the Audi Q4 e-tron. In Europe, many public chargers are 22 kW AC, so this difference can mean charging roughly twice as fast at those locations.
If you mostly charge at home or at work and care more about daily driving costs, the Smart #3 is the more efficient choice at 175 Wh/km. Lower consumption means lower electricity bills over time.
For maximum range between charges, the Audi Q4 e-tron has a WLTP rated range of approximately 562 km, which is roughly 147 km more. Both are capable EVs. The best choice depends on how you charge and how far you drive.
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From Finn, engineer: Charging specs alone do not tell the full story. Real-world charging speed depends on battery temperature, state of charge, and the charger itself. These comparisons use manufacturer-published data. Approximate values only.
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