The Honda Odyssey is longer overall than the Toyota Sienna. In terms of interior space, both minivans offer comparable passenger and cargo room, with only small differences depending on trim and seating configuration.
Exterior size and footprint
Length and overall footprint
When you measure by exterior length, the Odyssey is the larger of the two. The Honda typically runs in the low 200s inches in length, while the Sienna sits closer to the high 190s to around 200 inches, depending on year and trim. This difference translates to a noticeably larger footprint for the Odyssey.
- Honda Odyssey: generally around 203–205 inches long, with a width near 78 inches.
- Toyota Sienna: generally around 199–200 inches long, with a width near 78 inches.
In practical terms, the Odyssey’s extra length makes it feel more substantial in garages and parking spots, even though both vans offer similar interior layouts.
Width and wheelbase
Width for both models is very close, and wheelbase differences are modest. A similar width helps both vans look roomy inside, while wheelbase variations influence ride feel and interior space distribution.
- Odyssey wheelbase: about 118–119 inches.
- Sienna wheelbase: about 119–120 inches.
Overall, the two vans ride and feel similarly wide inside, with minor differences tied to wheelbase length and chassis tuning.
Interior space and practicality
Passenger volume
Both minivans aim to maximize interior comfort with three-row seating and flexible configurations. Passenger volume is roughly similar across recent model years, meaning most families will find comparable headroom and legroom in the front and middle rows.
- Odyssey: interior space designed to seat up to eight (or seven with captain’s chairs) with generous cabin feel.
- Sienna: similarly roomy interior, with seating options that emphasize versatility and comfort.
Seat configuration—such as choosing captain’s chairs in the second row—can affect perceived space, but in broad terms the cabins are comparable in size.
Cargo space
The cargo areas behind the third row and with seats folded are similar between the two vans, with small variances based on model year and trim. Both offer practical storage for families, groceries, and gear, and can expand significantly when rear rows are folded or removed.
- Behind the third row: roughly similar, typically in the low 30s cubic feet range for both models.
- Maximum cargo with seats folded or removed: both vans can exceed substantial cubic footage, depending on configuration.
For most daily tasks, the storage difference between the Odyssey and Sienna is not a decisive factor; both deliver ample versatility for families and long trips.
Bottom line
The Odyssey is the bigger vehicle in terms of exterior length, delivering a larger footprint overall. Inside, however, both minivans offer comparable space for passengers and cargo, with only minor differences that depend on seating choices and model year. If you need the longest exterior footprint for parking or highway presence, the Odyssey is the bigger option. If you prioritize hybrid efficiency and a slightly smaller outside size with similar interior capacity, the Sienna is a strong alternative.
Summary
In short: the Honda Odyssey is bigger on the outside, while interior space and practicality are closely matched between the Odyssey and the Toyota Sienna. Your decision should hinge on whether exterior footprint or nuanced interior config matters most for your family’s needs.