XT4 vs GLB
Two makers, one class, one decision: the XT4 from Cadillac or the GLB from Mercedes-Benz. Call it a near draw on paper, with just a few specs pulling the two apart.
At a glance
- Engine & Performance XT4 wins
- Fuel Economy & Range GLB wins
- Space & Practicality Tie
- Off-road & Towing Tie
- Engine & Performance5.9
- Fuel Economy & Range4.3
- Engine & Performance4.9
- Fuel Economy & Range5.4
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 GLB has better fuel economy
The GLB wins this narrowly, 28 mpg against 26 mpg, which makes it more of a bonus than a reason to buy. Official figures rarely match real-world driving exactly, but the ranking between two cars tends to hold.
-
The XT4 has 14 hp more power
The XT4 has a modest edge on total system output: 235 hp against 221 hp for the GLB. Power is only part of the story; weight, gearing and torque delivery shape how quick a car feels.
-
The GLB has better highway fuel economy
It’s a small lead (33 mpg versus 29 mpg), but it’s real, and it goes to the GLB. Speed, wind and load affect highway use a lot, but the official rating is a fair comparison point.
Design & Size
Dimensions
| Spec | XT4 | GLB |
|---|---|---|
| Length | 181.1 in | N/A (not specified) |
| Wheelbase | 109.4 in | N/A (not specified) |
Engine & Performance
XT4 leads
By a small margin, the XT4 is the stronger of the two in this area. The XT4 takes this one with 14 hp more power. More power helps with merging, overtaking and climbing hills, especially with passengers and luggage on board. Bottom line for engine & performance: the XT4 has the edge.
Total system output
XT4: 235 hp GLB: 221 hp The XT4’s extra output gives it more in reserve when you need to get up to speed.
Fuel Economy & Range
GLB leads
The GLB wins the fuel economy & range section decisively. The GLB brings better fuel economy. Better combined fuel economy lowers your running costs every week, and the savings add up over years of ownership. That makes the GLB the natural choice for buyers focused on fuel economy & range.
Fuel economy (combined)
XT4: 26 mpg GLB: 28 mpg The GLB uses less fuel on the standard combined cycle, which matters most if you drive a lot.
Fuel economy (highway)
XT4: 29 mpg GLB: 33 mpg The GLB uses less fuel on the highway, a real saving on road trips and long commutes.
Space & Practicality
Too close to call
The space & practicality specs are close enough that neither gets the point. The space & practicality verdict: no winner, and no reason to worry either way.
Off-road & Towing
Too close to call
Neither pulls ahead on off-road & towing; the numbers are close throughout. Bottom line for off-road & towing: it’s a wash.
Safety & Tech
The safety & tech data here comes as names and types, not scores. Check the table to see what each one uses.
Full Specifications
Engine & Performance
| Spec | XT4 | GLB |
|---|---|---|
| Powertrain | Gas | Gas (48V mild hybrid) |
| Engine | 2.0L turbo I4 | 2.0L turbo I4 |
| Total system output | 235 hp (winner) | 221 hp |
| Torque | 258 lb-ft | 258 lb-ft |
| Transmission | 9-speed automatic | 8-speed dual-clutch |
| Drivetrain | FWD (AWD available) | FWD (4MATIC AWD available) |
Fuel Economy & Range
| Spec | XT4 | GLB |
|---|---|---|
| Fuel economy (combined)EPA estimate where available | 26 mpg | 28 mpg (winner) |
| Fuel economy (city) | 24 mpg | 25 mpg |
| Fuel economy (highway) | 29 mpg | 33 mpg (winner) |
Space & Practicality
| Spec | XT4 | GLB |
|---|---|---|
| Seats | 5 seats | 5 seats |
| Cargo (behind rear seats) | 22.5 cu ft | N/A (not specified) |
| Cargo (seats folded) | 48.9 cu ft Least room, seats folded | N/A (not specified) |
Off-road & Towing
| Spec | XT4 | GLB |
|---|---|---|
| AWD / 4WD available | Yes | Yes |
Safety & Tech
| Spec | XT4 | GLB |
|---|---|---|
| Basic warranty | 4 yr / 50,000 mi | 4 yr / 50,000 mi |
Dimensions
| Spec | XT4 | GLB |
|---|---|---|
| Length | 181.1 in | N/A (not specified) |
| Wheelbase | 109.4 in | N/A (not specified) |
Price
| Spec | XT4 | GLB |
|---|---|---|
| Starting MSRP | $40,795 Priciest in class | N/A (not specified) |
“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.
Which One Should You Buy?
Choose the XT4 if…
- you want more power (235 hp vs 221 hp)
- you already know your way around Cadillac’s products
Choose the GLB if…
- you drive a lot and want lower running costs (28 mpg vs 26 mpg combined)
- you want better highway fuel economy (33 mpg vs 29 mpg)
- you prefer staying with Mercedes-Benz
Also Compared
Frequently Asked Questions
Which is better for most people, the XT4 or the GLB?
The GLB wins more of the areas we compared, so it’s the safer pick unless you’d rather have 14 hp more power on the XT4.
Executive Summary
If you’ve narrowed it down to the XT4 and the GLB, you’ve already done the hard part. Let me help with the rest. The GLB wins me over with better fuel economy. I don’t want to sell the XT4 short, though: it has 14 hp more power.
I think of the XT4 as the one for engine & performance and the GLB as the one for fuel economy & range.
My pick: the GLB, though the XT4 makes sense if you specifically want 14 hp more power, where the XT4 has the edge.
Personal opinion based on the data above. Your priorities may differ.