ADX vs UX 300h
Brand preference aside, the ADX and the UX 300h are close competitors, both pitched at subcompact luxury suv buyers. The choice here comes down to priorities: space & practicality favors the ADX, while fuel economy & range favors the UX 300h.
At a glance
- Engine & Performance Tie
- Fuel Economy & Range UX 300h wins
- Space & Practicality ADX wins
- Off-road & Towing Tie
- Safety & Tech UX 300h wins
- Price ADX wins
- Fuel Economy & Range5.3
- Fuel Economy & Range10.0
Spec scores (0 to 10) are calculated from manufacturer specs against other models in the same class. See how the formula works. They are not reviews or user ratings.
Key Differences
-
The UX 300h has better fuel economy
This is one of the widest gaps in the whole comparison: 43 mpg for the UX 300h versus 28 mpg for the ADX. Official figures rarely match real-world driving exactly, but the ranking between two cars tends to hold.
-
The ADX has 42% more cargo space
The UX 300h lists 17.2 cu ft; the ADX comes in at 24.4 cu ft. That’s not a rounding error. Cargo space behind the rear seats is what you use every day for groceries, strollers and luggage.
-
The UX 300h has better city fuel economy
At 45 mpg versus 26 mpg, this is a decisive lead for the UX 300h, the kind of difference you notice without looking for it. Hybrids often shine in the city, and the UX 300h has the better rating here.
-
The UX 300h has a bigger 12.3 in touchscreen
If largest touchscreen is one of your priorities, this settles it: the UX 300h leads clearly with 12.3 in to the ADX’s 9 in. A bigger touchscreen makes maps and phone mirroring easier to read at a glance.
-
The UX 300h has better highway fuel economy
The numbers aren’t close. The UX 300h lists 41 mpg for fuel economy (highway), while the ADX lists 31 mpg. Speed, wind and load affect highway use a lot, but the official rating is a fair comparison point.
Design & Size
- ADX 185.8 in × 72.5 in × 63.8 in
- UX 300h 177 in × 72.4 in × 60.6 in
Physically, these two aren’t the same size: the ADX is larger in overall dimensions.
Dimensions
| Spec | ADX | UX 300h |
|---|---|---|
| Length | 185.8 in | 177 in |
| Width (no mirrors) | 72.5 in | 72.4 in |
| Height | 63.8 in | 60.6 in |
| Wheelbase | 104.5 in | 103.9 in |
Engine & Performance
Too close to call
Side by side, the engine & performance figures for the ADX and the UX 300h barely differ. Neither car gives you a reason to choose it on engine & performance.
Fuel Economy & Range
UX 300h leads
Look at the fuel economy & range table and one name keeps coming out on top: the UX 300h. The UX 300h answers with better fuel economy. Better combined fuel economy lowers your running costs every week, and the savings add up over years of ownership. For anyone who cares most about fuel economy & range, the UX 300h is the safer choice.
Fuel economy (combined)
ADX: 28 mpg UX 300h: 43 mpg The UX 300h uses less fuel on the standard combined cycle, which matters most if you drive a lot.
Fuel economy (city)
ADX: 26 mpg UX 300h: 45 mpg In town, driving style has a big effect, but the UX 300h starts from a better baseline.
Space & Practicality
ADX leads
The ADX is the clear pick if space & practicality is what you care about most. Point to the ADX for 42% more cargo space. Cargo figures are measured in different ways by different makers, so small gaps may not show in practice. The takeaway: on space & practicality, the ADX is the stronger car.
Cargo (behind rear seats)
ADX: 24.4 cu ft UX 300h: 17.2 cu ft The ADX’s larger cargo area makes family trips and big shopping runs easier.
Off-road & Towing
Too close to call
You can skip ahead if off-road & towing was your deciding factor: the two are evenly matched here. Both cover off-road & towing well enough that other priorities should break the tie.
Safety & Tech
UX 300h leads
By a small margin, the UX 300h is the stronger of the two in this area. On its side, the UX 300h has a bigger 12.3 in touchscreen. Screen size isn’t everything (physical controls and software speed matter too), but bigger is easier to read. Weighing only safety & tech, the UX 300h comes out ahead.
Largest touchscreen
ADX: 9 in UX 300h: 12.3 in The UX 300h’s larger display gives navigation and menus more room.
Full Specifications
Engine & Performance
| Spec | ADX | UX 300h |
|---|---|---|
| Powertrain | Gas | Hybrid |
| Engine | 1.5L turbo I4 | 2.0L I4 hybrid |
| Total system output | 190 hp | 196 hp |
| Torque | 179 lb-ft Least torque in class | N/A (not specified) |
| Transmission | CVT | eCVT |
| Drivetrain | FWD (SH-AWD available) | FWD (AWD available) |
Fuel Economy & Range
| Spec | ADX | UX 300h |
|---|---|---|
| Fuel economy (combined)EPA estimate where available | 28 mpg | 43 mpg (winner) Most efficient in class |
| Fuel economy (city) | 26 mpg | 45 mpg (winner) Best city economy |
| Fuel economy (highway) | 31 mpg | 41 mpg (winner) Best highway economy |
| Fuel tank | 14 gal | 10.6 gal |
Space & Practicality
| Spec | ADX | UX 300h |
|---|---|---|
| Seats | 5 seats | 5 seats |
| Cargo (behind rear seats) | 24.4 cu ft (winner) | 17.2 cu ft Smallest cargo area |
| Cargo (seats folded) | 55.1 cu ft | N/A (not specified) |
Off-road & Towing
| Spec | ADX | UX 300h |
|---|---|---|
| AWD / 4WD available | Yes | Yes |
Safety & Tech
| Spec | ADX | UX 300h |
|---|---|---|
| Largest touchscreen | 9 in | 12.3 in (winner) |
| Driver-assist suite | AcuraWatch | N/A (not specified) |
| Basic warranty | 4 yr / 50,000 mi | 4 yr / 50,000 mi |
Dimensions
| Spec | ADX | UX 300h |
|---|---|---|
| Length | 185.8 in | 177 in |
| Width (no mirrors) | 72.5 in | 72.4 in |
| Height | 63.8 in | 60.6 in |
| Wheelbase | 104.5 in | 103.9 in |
Price
| Spec | ADX | UX 300h |
|---|---|---|
| Starting MSRP | $35,000 (winner) Lowest price in class | $37,455 |
“N/A” means the manufacturer does not specify the value or we could not confirm it. Figures marked “manufacturer rating” are the maker’s own claims, not our measurements.
Price & Value
Price barely moves the needle here: the UX 300h launched $2,455 higher. The ADX gives up some areas but saves $2,455; the UX 300h wins others and charges for it.
All prices are official US launch prices, last checked launch. Actual prices at stores may differ.
Which One Should You Buy?
Choose the ADX if…
- you want more cargo space behind the rear seats (24.4 cu ft vs 17.2 cu ft)
- you don’t need the extras that cost $2,455 more
- you find that bigger suits the way you use a car
Choose the UX 300h if…
- you drive a lot and want lower running costs (43 mpg vs 28 mpg combined)
- you mostly drive in town (45 mpg vs 26 mpg in the city)
- you want the bigger touchscreen (12.3 in vs 9 in)
- you want better highway fuel economy (41 mpg vs 31 mpg)
Also Compared
Frequently Asked Questions
Which is better for most people, the ADX or the UX 300h?
It depends on your priorities: the ADX is stronger on space & practicality, while the UX 300h leads on fuel economy & range.
Which is larger, the ADX or the UX 300h?
Going by the official dimensions, the ADX is the bigger of the two at 185.8 × 72.5 × 63.8 in. The UX 300h measures 177 × 72.4 × 60.6 in.
Which costs less, the ADX or the UX 300h?
Going by launch prices, the ADX costs $2,455 less than the UX 300h. Prices as of launch; current offers may differ.
Executive Summary
Here’s my honest read on a classic rivalry: Acura’s ADX against Lexus’s UX 300h. The single spec I’d point a friend to is this: the ADX has 42% more cargo space. Where the UX 300h fights back is better fuel economy.
I think of the ADX as the one for space & practicality and the UX 300h as the one for fuel economy & range.
My pick: I can’t crown one. The ADX wins on space & practicality, the UX 300h on fuel economy & range, and your habits decide.
Personal opinion based on the data above. Your priorities may differ.