8 Series vs 911
In the sports car class, the 8 Series and the 911 are natural rivals. Neither wins across the board. The 8 Series makes its case with fuel economy & range; the 911 makes its case with engine & performance.
At a glance
- Engine & Performance 911 wins
- Fuel Economy & Range 8 Series wins
- Space & Practicality Tie
- Off-road & Towing Tie
- Engine & Performance3.7
- Fuel Economy & Range4.1
- Engine & Performance4.1
- Fuel Economy & Range2.0
Spec scores (0 to 10) are calculated from manufacturer specs against other models in the same class. See how the formula works. They are not reviews or user ratings.
Key Differences
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The 911 has 53 hp more power
It’s a lopsided result (388 hp for the 911, 335 hp for the 8 Series) and one of the main reasons to choose between them. More power helps with merging, overtaking and climbing hills, especially with passengers and luggage on board.
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The 8 Series has better fuel economy
Only a little separates them: 24 mpg on the 8 Series, 21 mpg on the 911. The 8 Series uses less fuel on the standard combined cycle, which matters most if you drive a lot.
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The 8 Series has better city fuel economy
The spread here is large: 21 mpg on the 8 Series versus 18 mpg on the 911. Expect to notice it. In town, driving style has a big effect, but the 8 Series starts from a better baseline.
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The 8 Series has better highway fuel economy
Of all the specs we compared, this is one where the 8 Series makes its strongest case: 29 mpg against 25 mpg. Speed, wind and load affect highway use a lot, but the official rating is a fair comparison point.
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The 8 Series has 37 lb-ft more torque
It’s a fine margin, and it favors the 8 Series (368 lb-ft versus 331 lb-ft). More torque means stronger pulling from low speeds, which you feel when accelerating from a stop or climbing grades.
Design & Size
Engine & Performance
911 leads
This is one of the 911’s strongest areas. On engine & performance, the 8 Series falls well short. On the 911, you get 53 hp more power. The 911’s extra output gives it more in reserve when you need to get up to speed. Here the 8 Series offers 37 lb-ft more torque. For anyone who cares most about engine & performance, the 911 is the safer choice.
Total system output
8 Series: 335 hp 911: 388 hp Power is only part of the story; weight, gearing and torque delivery shape how quick a car feels.
Torque
8 Series: 368 lb-ft 911: 331 lb-ft The 8 Series’s extra torque makes it more relaxed when fully loaded or towing.
Fuel Economy & Range
8 Series leads
If fuel economy & range is high on your list, the 8 Series makes the stronger case by a wide margin. The 8 Series scores with better fuel economy. Official figures rarely match real-world driving exactly, but the ranking between two cars tends to hold. Bottom line for fuel economy & range: the 8 Series has the edge.
Fuel economy (combined)
8 Series: 24 mpg 911: 21 mpg Better combined fuel economy lowers your running costs every week, and the savings add up over years of ownership.
Fuel economy (city)
8 Series: 21 mpg 911: 18 mpg Hybrids often shine in the city, and the 8 Series has the better rating here.
Space & Practicality
Too close to call
The space & practicality section is even. Any gaps here are within the range you’d never notice. In short, space & practicality is a draw; the decision lies elsewhere.
Off-road & Towing
Too close to call
On paper, the off-road & towing comparison ends all square. The off-road & towing verdict: no winner, and no reason to worry either way.
Safety & Tech
The safety & tech data here comes as names and types, not scores. Check the table to see what each one uses.
Full Specifications
Engine & Performance
| Spec | 8 Series | 911 |
|---|---|---|
| Powertrain | Gas | Gas |
| Engine | 3.0L turbo I6 | 3.0L twin-turbo flat-6 |
| Total system output | 335 hp | 388 hp (winner) |
| Torque | 368 lb-ft (winner) | 331 lb-ft |
| Transmission | 8-speed automatic | 8-speed dual-clutch (PDK) |
| Drivetrain | RWD (xDrive AWD available) | RWD (AWD available on Carrera 4 models) |
Fuel Economy & Range
| Spec | 8 Series | 911 |
|---|---|---|
| Fuel economy (combined)EPA estimate where available | 24 mpg (winner) | 21 mpg |
| Fuel economy (city) | 21 mpg (winner) | 18 mpg |
| Fuel economy (highway) | 29 mpg (winner) | 25 mpg |
Space & Practicality
| Spec | 8 Series | 911 |
|---|---|---|
| Seats | 4 seats | 4 seats |
Off-road & Towing
| Spec | 8 Series | 911 |
|---|---|---|
| AWD / 4WD available | Yes | Yes |
Safety & Tech
| Spec | 8 Series | 911 |
|---|---|---|
| Basic warranty | 4 yr / 50,000 mi | 4 yr / 50,000 mi |
“N/A” means the manufacturer does not specify the value or we could not confirm it. Figures marked “manufacturer rating” are the maker’s own claims, not our measurements.
Which One Should You Buy?
Choose the 8 Series if…
- you want better combined fuel economy (24 mpg vs 21 mpg)
- you want better city fuel economy (21 mpg vs 18 mpg)
- you want better highway fuel economy (29 mpg vs 25 mpg)
- you often drive loaded up or with a trailer (368 lb-ft vs 331 lb-ft of torque)
Choose the 911 if…
- you want more power (388 hp vs 335 hp)
- you prefer staying with Porsche
Also Compared
Frequently Asked Questions
Should I buy the 8 Series or the 911?
There’s no single right answer. The 8 Series leads on fuel economy & range and the 911 on engine & performance.
Executive Summary
Honestly, the 8 Series versus the 911 is one of those matchups where your priorities matter more than the logo. Practically speaking, the 8 Series’s biggest advantage is better fuel economy. And if that weren’t enough, the 8 Series has better highway fuel economy. Where the 911 fights back is 53 hp more power.
Match the strength to your habits (fuel economy & range for the 8 Series, engine & performance for the 911), and you won’t go far wrong.
My pick: decide whether you’d miss fuel economy & range or engine & performance more, then buy the 8 Series or the 911 accordingly.
Personal opinion based on the data above. Your priorities may differ.