Audi A5 - MPG, emissions & running costs
Reasonable but not ground-breaking for efficiency, at least until the PHEVs join the range in the first half of 2025
| Model | MPG | CO2 | Insurance group |
| Audi A5 TFSI 150PS S Line | 42.8mpg | 154g/km | TBC |
| Audi A5 TFSi 204PS S line | 42.8mpg | 155g/km | TBC |
| Audi A5 TDI 204PS S Line | 58.9mpg | 127g/km | TBC |
Maybe the most interesting thing about the engine line-up in the short term is that Audi has retained a sole diesel option, which is by far the most efficient model, thanks to its official figure of up to 58.9mpg, depending on things like wheel size and specification. That does drop back to 55.3mpg if you want the quattro four-wheel drive car, but compares with a best of 42.2mpg for both the 148bhp and 201bhp petrols.
That’s broadly in line with rivals such as the BMW 3 Series and 4 Series Gran Coupe, with the admittedly slightly less powerful 184bhp petrol cars around 1mpg above the Audi on the official test, while the 1.5-litre 204bhp petrol engine in the Mercedes C 200 saloon is about another mile per gallon better on top. That’s despite the A5 diesel getting new mild-hybrid tech that can run the car for short distances on electric power and otherwise gives an efficiency boost.
You can’t even buy a 3 Series diesel any more, but on the flip-side the 200bhp Mercedes diesel is more efficient than Audi’s. And both BMW and Mercedes already have plug-in hybrids on sale, which Audi won’t be able to say until the first half of 2025.
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The PHEV will definitely be the best option for company car drivers, but the car’s emissions see the diesel sit five Benefit-in-Kind tax bands below the 148bhp petrol, with the more powerful petrol another one higher.
Tax
Predictably, no versions of the A5 duck under the £40,000 threshold for luxury car tax, so all suffer from higher Vehicle Excise Duty rates in years two through to six of their life. Given that there isn’t an electric A5, there isn’t a version that offers a route to cheaper company car tax, or is positioned to evade charges in low-emission zones that benefit electric cars.
Insurance groups
Insurance groups haven’t been released at time of writing, but Audi has generally been close to the group rating of its premium-brand peers.
Depreciation
The A5 holds its value well, with all models in the high 40 per cent area for depreciation, according to experts. The BMW 3 Series is slightly ahead, just breaching the 50 per cent barrier, while Mercedes is further back on around 43 per cent. The BMW is also the cheapest of the three, and is predicted to be worth the same as the Audi after three years and 36,000 miles, despite the Audi starting several thousand pounds more expensive.
