For 2021, the Toyota Sienna has an exciting charge, er, change, to its powertrain. Toyota has now introduced a minivan to the segment offering only a gasoline-electric hybrid powertrain to increase fuel economy, provide optional AWD traction, and provide a smooth driving experience. Altogether, the 2.5-liter inline-four engine and dual electric motors produce 243 horsepower while churning out 36 mpg in the city and on the highway according to the EPA. Opting for all-wheel drive to pull you out of sticky situations will cost you an MPG in the city. Your choice.
During our testing, the 2021 Toyota Sienna MPG returned 25 miles to the gallon according to our calculations, but this could’ve been contributed to a faulty fill at the beginning of the test we were unaware of or possibly the engine not being fully broken-in. According to the Sienna’s trip computer, it was reading 33 MPG, which is much closer to what the EPA advertises. We will make sure to retest when we get another opportunity.
The Sienna has an 18 gallon fuel tank; therefore, if someone road-tripped this vehicle (and we assume many will), it could travel about 600 miles before needing a drink. If calculated by the EPA’s number then that stretches to a long-winded 650 miles! Chances are someone under the age of ten will need to stop off to relieve themselves before that point, or those of legal voting age will need a break from those under the age of said legal voting age. Bless their hearts.
How We Test
This Daily Motor real-world highway-fuel-economy test consists of over 100 miles of consistent freeway driving. We fill the car using the “three-click method,” meaning running the gas pump on high flow until it clicks, waiting 10 seconds, running low flow until it clicks again, waiting another 10 seconds, then running low flow one last time. The lowest-octane fuel accepted by the vehicle’s manufacturer is used. We then drive about 50 miles on public highway in one direction and then back in the opposite direction, attempting not to draft or drive aggressively. We set the cruise control at GPS-indicated 72 MPH in an attempt to achieve a moving average speed of 70 MPH over the entire test. Upon return to the gas station, we refill at the same gas pump as the initial fill using the same fueling method. MPG is determined by dividing total miles traveled by fuel used. In cases where our observed figure differs greatly from the vehicle’s indicated figure and/or EPA’s estimate, we may recommend a number in between or plan to retest the vehicle, like we will with this test.
See our complete test of the 2021 Toyota Sienna MPG here: