DecodedCars2018 Porsche 911
Trims, performance, features, fuel economy, safety and known problems — with the pros and cons against similar 2018 models.
- Class
- Minicompact Cars
- Body styles
- Carrera 4/4s/4gts 2dr Coupe AWD, Carrera 4/4s/4gts Cabriolet AWD, Carrera Base/S 2dr Coupe RWD, Carrera Base/S Cabriolet 2dr Convertible
- Engines
- 3.0L 6-cyl turbo, 3.8L 6-cyl turbo, 4.0L 6-cyl
- Horsepower
- 370–500 hp
- Transmission
- 7-speed automatic
- Drivetrain
- Rear-Wheel Drive, 4-Wheel Drive, All-Wheel Drive
- Seats
- 2–4
- Fuel
- Premium Gasoline
- MPG (best)
- 25 combined · 22 city / 30 hwy
- Length
- 176.8 in
- Curb weight
- 3,142–3,417 lb
- NHTSA rating
- Not rated
- Recalls
- 2 campaigns
Pros & cons
What's good
- AWD / 4WD available
Watch out for
- Premium fuel requiredEvery gasoline version is rated for premium, which raises running costs.
Calculated from EPA, NHTSA and vPIC data against 3 similar 2018 models — not a review. How we calculate this →
Overview
The 2018 Porsche 911 is a minicompact car offered with 3 engines (3.0L 6-cyl turbo, 3.8L 6-cyl turbo and 4.0L 6-cyl) and rear-wheel drive, 4-wheel drive and all-wheel drive.
It measures about 177 inches long and 73 inches wide on a 97-inch wheelbase, with a curb weight of roughly 3,263 lb (Carrera 4/4s/4gts 2dr Coupe AWD).
EPA rates its most efficient version at 25 MPG combined (22 city / 30 highway), 9% better than the 2018 minicompact car average of 22.9 MPG, for an estimated $3,300 a year in fuel.
NHTSA has not published a 5-Star overall rating for this model year.
It has 2 recall campaigns on file and owners have filed 2 complaints with NHTSA since 2015, most often about the electrical system.
What changed for 2018
- Engine added: 4.0L 6-cyl
Compared with 2017; trim, feature and price changes aren't covered. See the 2017 911 →
Trims, performance & features
Engine370 hp3.0L 6-cyl
Engine500 hp4.0L 6-cyl
Transmission7-speed automatic
DriveRWD
Seating2–4 seats · 2 rows
Trims
Carrera (2WD) / Carrera 4 (4WD)GT3
Safety & driver-assist features
Automatic emergency brakingOptional
Forward collision warningOptional
Blind-spot monitoringOptional
Adaptive cruise controlOptional
Parking assistStandard
Backup cameraStandard
Automatic high beamsStandard
Adaptive driving beamStandard
Keyless startSome trims
Built in: Stuttgart-Zuffenhausen, Germany
NHTSA vPIC, as reported by the manufacturer for 2 2018 911 configurations; may not list every trim. How we calculate this →
Dimensions & weight
| Body | Length | Width | Height | Wheelbase | Track F / R | Curb weight | Weight F/R |
|---|---|---|---|---|---|---|---|
| Carrera 4/4s/4gts 2dr Coupe AWD | 176.8 in | 72.8 in | 51.2 in | 96.5 in | 60.2 / 61.4 in | 3,263 lb | 38/62 |
| Carrera 4/4s/4gts Cabriolet AWD | 176.8 in | 72.8 in | 51.2 in | 96.5 in | 60.2 / 61.4 in | 3,417 lb | 38/62 |
| Carrera Base/S 2dr Coupe RWD | 176.8 in | 71.3 in | 51.2 in | 96.5 in | 60.2 / 59.8 in | 3,153 lb | 38/62 |
| Carrera Base/S Cabriolet 2dr Convertible | 176.8 in | 71.3 in | 51.2 in | 96.5 in | 60.2 / 59.8 in | 3,307 lb | 38/62 |
| Carrera Gts 2dr Coupe RWD | 176.8 in | 72.8 in | 51.2 in | 96.5 in | 60.2 / 61.4 in | 3,142 lb | 38/62 |
| Carrera Gts Cabriolet 2dr Convertible | 176.8 in | 72.8 in | 51.2 in | 96.5 in | 60.2 / 61.4 in | 3,296 lb | 38/62 |
Transport Canada CVS (Open Government Licence – Canada), Canadian-market figures.
Will it fit your garage? Check with your measurements →Engines, MPG & running costs
| Version | Engine | Transmission | Drive | City / Hwy / Comb | vs. class | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|---|---|
| 911 Carrera | 3.0L 6-cyl turbo | Automatic (AM-S7) | Rear-Wheel Drive | 22 / 30 / 25 | +9% | $3,300 | 355 |
| 911 Carrera Cabriolet | 3.0L 6-cyl turbo | Automatic (AM-S7) | Rear-Wheel Drive | 22 / 28 / 24 | +5% | $3,400 | 365 |
| 911 Carrera S | 3.0L 6-cyl turbo | Automatic (AM-S7) | Rear-Wheel Drive | 22 / 28 / 24 | +5% | $3,400 | 363 |
| 911 Carrera S Cabriolet | 3.0L 6-cyl turbo | Automatic (AM-S7) | Rear-Wheel Drive | 22 / 28 / 24 | +5% | $3,400 | 367 |
| 911 Carrera 4 | 3.0L 6-cyl turbo | Automatic (AM-S7) | 4-Wheel Drive | 22 / 28 / 24 | +5% | $3,400 | 362 |
| 911 Carrera 4 Cabriolet | 3.0L 6-cyl turbo | Automatic (AM-S7) | 4-Wheel Drive | 21 / 28 / 24 | +5% | $3,400 | 370 |
| 911 Carrera 4S | 3.0L 6-cyl turbo | Automatic (AM-S7) | 4-Wheel Drive | 21 / 28 / 24 | +5% | $3,400 | 373 |
| 911 Carrera 4S Cabriolet | 3.0L 6-cyl turbo | Automatic (AM-S7) | 4-Wheel Drive | 21 / 28 / 24 | +5% | $3,400 | 371 |
| 911 Targa 4 | 3.0L 6-cyl turbo | Automatic (AM-S7) | 4-Wheel Drive | 22 / 28 / 24 | +5% | $3,400 | 367 |
| 911 Targa 4S | 3.0L 6-cyl turbo | Automatic (AM-S7) | 4-Wheel Drive | 21 / 27 / 24 | +5% | $3,400 | 376 |
| 911 Carrera | 3.0L 6-cyl turbo | Manual 7-spd | Rear-Wheel Drive | 20 / 29 / 23 | 0% | $3,550 | 382 |
| 911 Carrera Cabriolet | 3.0L 6-cyl turbo | Manual 7-spd | Rear-Wheel Drive | 20 / 29 / 23 | 0% | $3,550 | 388 |
| 911 Carrera S | 3.0L 6-cyl turbo | Manual 7-spd | Rear-Wheel Drive | 20 / 29 / 23 | 0% | $3,550 | 389 |
| 911 Carrera S Cabriolet | 3.0L 6-cyl turbo | Manual 7-spd | Rear-Wheel Drive | 20 / 28 / 23 | 0% | $3,550 | 391 |
| 911 Carrera 4 | 3.0L 6-cyl turbo | Manual 7-spd | 4-Wheel Drive | 20 / 28 / 23 | 0% | $3,550 | 389 |
| 911 Carrera 4S | 3.0L 6-cyl turbo | Manual 7-spd | 4-Wheel Drive | 20 / 28 / 23 | 0% | $3,550 | 392 |
| 911 Carrera GTS | 3.0L 6-cyl turbo | Automatic (AM-S7) | Rear-Wheel Drive | 20 / 26 / 23 | 0% | $3,550 | 391 |
| 911 Targa 4S | 3.0L 6-cyl turbo | Manual 7-spd | 4-Wheel Drive | 19 / 28 / 22 | -4% | $3,750 | 396 |
| 911 Carrera GTS Cabriolet | 3.0L 6-cyl turbo | Automatic (AM-S7) | Rear-Wheel Drive | 20 / 26 / 22 | -4% | $3,750 | 400 |
| 911 Carrera 4 GTS | 3.0L 6-cyl turbo | Automatic (AM-S7) | 4-Wheel Drive | 20 / 26 / 22 | -4% | $3,750 | 400 |
| 911 Carrera 4 GTS Cabriolet | 3.0L 6-cyl turbo | Automatic (AM-S7) | 4-Wheel Drive | 20 / 25 / 22 | -4% | $3,750 | 402 |
| 911 Carrera 4 Cabriolet | 3.0L 6-cyl turbo | Manual 7-spd | 4-Wheel Drive | 19 / 28 / 22 | -4% | $3,750 | 395 |
| 911 Carrera 4S Cabriolet | 3.0L 6-cyl turbo | Manual 7-spd | 4-Wheel Drive | 19 / 28 / 22 | -4% | $3,750 | 396 |
| 911 Targa 4 | 3.0L 6-cyl turbo | Manual 7-spd | 4-Wheel Drive | 19 / 28 / 22 | -4% | $3,750 | 395 |
| 911 Targa 4 GTS | 3.0L 6-cyl turbo | Automatic (AM-S7) | 4-Wheel Drive | 20 / 26 / 22 | -4% | $3,750 | 404 |
| 911 Carrera T | 3.0L 6-cyl turbo | Automatic (AM-S7) | Rear-Wheel Drive | 20 / 26 / 22 | -4% | $3,750 | 399 |
| 911 Carrera GTS | 3.0L 6-cyl turbo | Manual 7-spd | Rear-Wheel Drive | 18 / 26 / 21 | -8% | $3,900 | 418 |
| 911 Carrera GTS Cabriolet | 3.0L 6-cyl turbo | Manual 7-spd | Rear-Wheel Drive | 18 / 26 / 21 | -8% | $3,900 | 415 |
| 911 Carrera 4 GTS | 3.0L 6-cyl turbo | Manual 7-spd | 4-Wheel Drive | 18 / 26 / 21 | -8% | $3,900 | 414 |
| 911 Carrera 4 GTS Cabriolet | 3.0L 6-cyl turbo | Manual 7-spd | 4-Wheel Drive | 18 / 26 / 21 | -8% | $3,900 | 419 |
| 911 Targa 4 GTS | 3.0L 6-cyl turbo | Manual 7-spd | 4-Wheel Drive | 18 / 26 / 21 | -8% | $3,900 | 428 |
| 911 Turbo | 3.8L 6-cyl turbo | Automatic (AM-S7) | All-Wheel Drive | 19 / 24 / 21 | -8% | $3,900 | 428 |
| 911 Turbo Cabriolet | 3.8L 6-cyl turbo | Automatic (AM-S7) | All-Wheel Drive | 19 / 24 / 21 | -8% | $3,900 | 430 |
| 911 Turbo S | 3.8L 6-cyl turbo | Automatic (AM-S7) | All-Wheel Drive | 19 / 24 / 21 | -8% | $3,900 | 428 |
| 911 Turbo S Cabriolet | 3.8L 6-cyl turbo | Automatic (AM-S7) | All-Wheel Drive | 19 / 24 / 21 | -8% | $3,900 | 430 |
| 911 Turbo S Exclusive | 3.8L 6-cyl turbo | Automatic (AM-S7) | All-Wheel Drive | 17 / 23 / 19 | -17% | $4,350 | 459 |
| 911 Carrera T | 3.0L 6-cyl turbo | Manual 7-spd | Rear-Wheel Drive | 16 / 25 / 19 | -17% | $4,350 | 461 |
| 911 GT3 | 4.0L 6-cyl | Automatic (AM-S7) | Rear-Wheel Drive | 15 / 20 / 17 | -13% | $4,850 | 522 |
| 911 GT2 RS | 3.8L 6-cyl turbo | Automatic (AM-S7) | Rear-Wheel Drive | 15 / 21 / 17 | -13% | $4,850 | 507 |
| 911 GT3 Touring | 4.0L 6-cyl | Manual 6-spd | Rear-Wheel Drive | 14 / 21 / 17 | -13% | $4,850 | 538 |
| 911 GT3 | 4.0L 6-cyl | Manual 6-spd | Rear-Wheel Drive | 13 / 21 / 16 | -18% | $5,150 | 566 |
5/10EPA fuel economy score (best version)
5/10EPA greenhouse gas score
Spend $4,500Fuel over 5 years vs. average new car
22.9 MPG2018 Minicompact Cars average
EPA estimates; "vs. class" is combined MPG against the 2018 EPA class average. How we calculate this →
Safety ratings & technology
NHTSA has not published 5-Star ratings for the 2018 Porsche 911.
Similar 2018 minicompact cars
| Model | Best MPG / range | NHTSA overall | Recalls |
|---|---|---|---|
| 2018 Porsche 911 (this car) | 25 MPG | Not rated | 2 |
| 2018 Mercedes-Benz AMG GT | 18 MPG | Not rated | 7 |
| 2018 Acura NSX | 21 MPG | Not rated | 3 |
| 2018 Jaguar F-Type | 26 MPG | Not rated | 3 |
Recalls (2)
Child Seat · Dec 11, 2019
NHTSA campaign 19V875000 · 15,501 vehicles
- Problem
- Porsche Cars North America, Inc. (Porsche) is recalling certain 2014 Cayman and Cayman S, 2014-2016 911 GT3, 2016 911 GT3 RS and 911 R, 2018 911 GT3 and 911 GT2 RS and 2019 911 GT3 RS, 911 GT3, and 911 GT2 RS vehicles. The Child Restraint System (CRS) instructions within the Owner's Manual may not provide enough specificity for proper installation. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 225, "Child Restraint Anchorage Systems."
- Risk
- Improper CRS installation increases the risk of an injury to the occupant in the event of a crash.
- Fix
- Porsche will notify owners, and dealers will provide a an Owner's Manual supplement with proper CRS installation instructions, free of charge. The recall began February 7, 2020. Owners may contact Porsche customer service at 1-800-767-7243. Porsche's number for this recall is AKC0.
Air Bags · Mar 6, 2019
NHTSA campaign 19V179000 · 417 vehicles
- Problem
- Porsche Cars North America, Inc. (Porsche) is recalling certain 2018 718 Boxster, Boxster S and Boxster GTS, 718 Cayman, Cayman S and Cayman GTS, 911 Carrera, Carrera T, Targa 4 GTS, Carrera 4, Carrera S, Carrera 4S, Carrera GTS, Carrera 4 GTS, Carrera Cabriolet, Carrera S Cabriolet, Carrera 4S Cabriolet, Carrera GTS Cabriolet, Carrera 4 GTS Cabriolet, Targa 4, Targa 4S, Turbo, Turbo S, Turbo S Exclusive Series, Turbo Cabriolet, Turbo S Cabriolet and GT3 vehicles. The side air bag impact sensors may not have been properly tightened to the vehicle.
- Risk
- In the event of a crash, the air bags may not deploy, increasing the risk of injury.
- Fix
- Porsche will notify owners, and dealers will tighten the air bag sensors, as necessary, free of charge. The recall began May 17, 2019. Owners may contact Porsche customer service at 1-800-767-7243. Porsche's number for this recall is AKA4.
Not every 2018 Porsche 911 is affected — only a VIN check confirms your car.
Owner-reported problems
2Complaints to NHTSA since 2015
0Involved a crash
0Involved a fire
0Injuries reported
26,000 miTypical mileage at failure
Unverified owner reports; best-sellers collect more.
Used 2018 Porsche 911 buyer's checklist
- Run the VIN at nhtsa.gov/recalls. 2 recalls this year — ask for proof of repairs.
- Electrical System › Ignition › Switch — 1 owner reports. Test every window, lock, light, screen and USB port; check the battery age.
- Back Over Prevention › Sensing System › Camera — 1 owner reports. Make sure driver-assist systems and the backup camera work without error messages.
- Mileage to watch. Owners typically reported problems around 26,000 miles; ask what was repaired near that point.
- Before you pay: service records, a history report and an independent inspection.
Generated by DecodedCars from NHTSA recalls and owner complaints for the 2018 Porsche 911. Not a substitute for a professional inspection.
Other 911 years
Compare all years →| Year | MPG (best) | Length | Overall | Recalls | Complaints |
|---|---|---|---|---|---|
| 2026 911 | 21 | 178 in | Not rated | 0 | 1 |
| 2025 911 | 21 | 178 in | Not rated | 2 | 2 |
| 2024 911 | 21 | 178 in | Not rated | 5 | 7 |
| 2023 911 | 21 | 178 in | Not rated | 8 | 3 |
| 2022 911 | 21 | 178 in | Not rated | 8 | 10 |
| 2021 911 | 21 | 178 in | Not rated | 8 | 6 |
| 2020 911 | 20 | 178 in | Not rated | 8 | 7 |
| 2019 911 | 25 | 176.8 in | Not rated | 3 | 2 |
| 2017 911 | 25 | 176.8 in | Not rated | 5 | 6 |
| 2016 911 | 23 | 176.8 in | Not rated | 3 | 2 |
| 2015 911 | 23 | 176.8 in | Not rated | 2 | 8 |
| 2014 911 | 23 | 176.8 in | Not rated | 4 | 4 |
Sources: EPA, NHTSA, Transport Canada, Wikimedia Commons. Not affiliated with NHTSA, the EPA or Porsche. How we calculate this →