Vehicle comparison
Kia Carnival vs Toyota Sienna
Side-by-side fuel and ownership cost comparison. Estimates use 12,000 mi/year at average US gas prices.
- Updated for 2026
- EPA-style MPG
- US avg fuel prices
- US units
- Transparent assumptions
Lowest running cost
Toyota Sienna wins on fuel cost
At 12,000 miles per year, the Toyota Sienna costs about $1150 per year, roughly $732 less than the Kia Carnival. Over 5 years, that's about $3659 in fuel savings.
Spec & cost comparison
MPG/MPGe figures are estimates based on typical recent model years.
| Spec | Kia Carnival | Toyota Sienna |
|---|---|---|
| Type | MINIVAN | MINIVAN |
| Fuel | Regular gas | Regular gas |
| City MPG/MPGe | 19 | 36 |
| Highway MPG/MPGe | 26 | 36 |
| Combined MPG/MPGe | 22 | 36 |
| Tank / Battery | 19 gal | 18 gal |
| Energy cost | $3.45/gal | $3.45/gal |
| Cost per mile | $0.157 | $0.096 |
Annual cost at 8k / 12k / 15k miles
Estimated yearly fuel spend at common US mileage levels.
| Miles/year | Kia Carnival | Toyota Sienna | Difference |
|---|---|---|---|
| 8,000 | $1255/yr · $105/mo | $767/yr · $64/mo | $488 (Toyota Sienna) |
| 12,000 | $1882/yr · $157/mo | $1150/yr · $96/mo | $732 (Toyota Sienna) |
| 15,000 | $2352/yr · $196/mo | $1438/yr · $120/mo | $915 (Toyota Sienna) |
Estimates only. Real costs depend on driving style, terrain, local gas/electricity prices and weather.
Which one is best for…
Best for commuting
Toyota Sienna
Highest combined MPG/MPGe and lowest cost per mile means cheaper daily driving.
See Toyota SiennaBest for road trips
Toyota Sienna
Better highway efficiency, larger tank/battery and longer range between stops.
See Toyota SiennaBest for families
Toyota Sienna
SUVs, minivans and three-row vehicles win on space and child-seat flexibility.
See Toyota SiennaBest for lowest running cost
Toyota Sienna
Cheaper energy use and lower cost per mile at every common mileage tier.
See Toyota SiennaHow we compare these vehicles
- Annual mileage
- Modeled at 12,000 mi/yr unless a scenario specifies otherwise.
- Cost per mile
- $/gal ÷ MPG, or $/kWh ÷ (MPGe ÷ 33.7) for EVs.
- EV vs gas
- Compared at average US gas and residential electricity prices — fast-charging can be 2–3× higher.
- Maintenance
- Fuel cost only — EVs typically save another $400–$1,000/yr in service and brake wear.
Sources & assumptions
- EPA fuel economy data — City / highway / combined MPG and MPGe baselines.
- U.S. Department of Energy (fueleconomy.gov) — Vehicle efficiency and EV range references.
- AAA gas price trends — Recent national and regional retail fuel averages.
- EIA electricity rates — Average residential per-kWh prices used for EV charging.
We summarize publicly available data — no scraping, no external API calls. Figures are calibrated periodically; use the calculators above for your exact inputs.
Frequently asked questions
Which is cheaper to drive, the Kia Carnival or Toyota Sienna?
At 12,000 miles per year, the Toyota Sienna costs about $1150 per year vs $1882 for the Kia Carnival — roughly $732 less per year.
What's the MPG difference between the Kia Carnival and Toyota Sienna?
The Kia Carnival is rated around 22 combined MPG versus 36 MPG for the Toyota Sienna. Highway figures are 26 vs 36.
How much will I spend on fuel over 5 years?
Driving 12,000 miles a year for five years, expect about $9409 for the Kia Carnival and $5750 for the Toyota Sienna, a difference of roughly $3659.
Is the Kia Carnival or Toyota Sienna better for commuting?
For pure cost per mile, the Toyota Sienna wins. EVs charged at home typically deliver the lowest commuting cost, followed by hybrids and efficient compacts.
Which one is better for road trips?
Toyota Sienna is generally the better road-trip choice — gas and hybrid vehicles win on long highway routes thanks to faster refueling, while EVs work best when charging stops fit your route.
Are these fuel cost numbers accurate for my driving?
They're estimates based on EPA-style combined MPG and average US gas prices. Real-world cost depends on local fuel prices, driving style, terrain, weather and how much city vs highway driving you do.