2018 Kia K900 — Full Specifications
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The 2018 Kia K900 is a saloon/sedan offered with 2 engines (3.8L 6-cyl, 5L 8-cyl). Its most fuel-efficient configuration returns around 24 mpg (UK) / 20 mpg (US EPA) combined, with 22–24 mpg (UK) across all configurations. Owners often keep a Kia K900 workshop manual to hand for servicing and repairs.
Compared with the 2017 Kia K900: Fuel economy is essentially unchanged at around 24 mpg (UK) combined. The engine line-up listed by EPA is unchanged.
Full Specifications
| Engine (most efficient) | 3.8L 6-cyl |
|---|---|
| Engine options | 3.8L 6-cyl · 5L 8-cyl |
| Transmission (most efficient) | Automatic (S8) |
| Fuel Type | Regular Gasoline |
| Powertrain | Conventional |
| Drive | Rear-Wheel Drive |
| Body Style | Saloon/Sedan |
| Passenger Volume (EPA) | 110 cu ft (3,115 L) |
| Luggage Volume (EPA) | 16 cu ft (453 L) |
| Fuel Economy (UK) | 24 combined / 20 urban / 30 extra-urban mpg |
| Fuel Economy (US EPA) | 20 combined / 17 city / 25 highway mpg |
| CO₂ Emissions | 278 g/km |
| EPA Greenhouse Gas Score | 3 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $3,350 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2018 Kia K900 across 2 engines (3.8L 6-cyl, 5L 8-cyl). Combined fuel economy ranges from 18 to 20 mpg (US), or 22 to 24 mpg (UK), depending on engine, transmission and drive. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 3.8L 6-cyl | Automatic (S8) | Rear-Wheel Drive | 24 | 20 (17/25) | 278 | $3,350 |
| 5L 8-cyl | Automatic (S8) | Rear-Wheel Drive | 22 | 18 (15/23) | 318 | $4,550 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
EPA measures interior passenger volume at 110 cubic feet (about 3,115 litres) and luggage volume at 16 cubic feet (about 453 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2018 Kia K900
Running Costs: 2018 Kia K900
Covering around 8,000 miles a year in a 2018 Kia K900 at 24 mpg combined, expect roughly 1,515 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,350 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Only need this car occasionally? See our buy vs rent comparison.
2018 Kia K900 Safety Ratings (NHTSA)
No NHTSA crash-test rating is on record for this model year. The NHTSA rates only a subset of vehicles each year; you can browse every rated vehicle on our NHTSA Safety Ratings hub.
How It Compares
Kia models in our database average about 34 mpg (UK) combined on their most efficient configuration; the 2018 Kia K900's 24 mpg is 10 mpg below that make average. Its 278 g/km CO₂ figure is 71 g/km higher than the 207 g/km Kia average.
Of the 6 Kia K900 model years we cover, the 2018 ranks 4th for combined fuel economy on its best configuration (24 mpg UK combined, against a high of 25 mpg). See every Kia K900 year side by side.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2018 Kia K900
Frequently Asked Questions
What engine does the 2018 Kia K900 have?
EPA lists 2 engines for the 2018 Kia K900: 3.8L 6-cyl, 5L 8-cyl. The most fuel-efficient configuration pairs the 3.8L 6-cyl with a automatic (s8).
What is the fuel economy of the 2018 Kia K900?
The most efficient configuration returns around 24 mpg (UK) combined, or 20 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 22 to 24 mpg.
How much does the 2018 Kia K900 cost to fuel per year?
The US EPA estimates about $3,350 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
How much interior and luggage space does the 2018 Kia K900 have?
EPA measures interior passenger volume at 110 cubic feet (about 3,115 litres) and luggage volume at 16 cubic feet (about 453 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.