Performance
The Pontiac Vibe is likely to feel a bit slow because of its high horsepower-to-weight ratio compared to the Audi A3.
When it comes to horsepower, the Audi A3 packs quite a wallop and will knock the Pontiac Vibe down a few rungs. On the flip side, note that high horsepower engines often command higher insurance premiums.
Handling
The Audi and the Pontiac Vibe have about similar tires.
With their comparable turning radiuses, the A3 and the Pontiac Vibe indubitably handle about the same into and out of tight spots.
Drivetrain
The Audi A3's engine isn't much larger than the Pontiac Vibe's.
Torque equals pickup, and the Audi A3 will have picked up and gone by the time the Vibe finally gets moving.
The Audi A3 packs quite a wallop compared to the Pontiac Vibe with respect to torque, which is roughly equivalent to acceleration.
Utility
There's no clear winner between the A3 and the Pontiac in terms of hauling capacity.
Neither the Pontiac nor the Audi has a marked advantage with respect to seating capacity.
Convenience
You doubtless won't have to visit your friendly gas station more often with the Pontiac Vibe than with the Audi A3, as both offer comparable mileage ranges.
Comfort
Taller drivers will substantially enjoy the extra head room in the Pontiac Vibe's front cabin compared to the Audi A3.
Dimensions
The Audi A3 is substantially heavier than the Pontiac Vibe.
The Vibe's tank is roughly the same size as the Audi A3's, though the Audi A3's is a tad more capacious.
The Vibe rides lower than the Audi A3, which is a good thing for its center of gravity and ease of access.
The Audi A3 and the Pontiac Vibe compete for the same parking spaces.
Cost
The destination charge is a standard charge for transporting the vehicle from its point of origin to the dealer. The Pontiac Vibe is quite a bit cheaper to get to the dealership than the Audi A3.
Regarding fuel economy, the Pontiac and the Audi A3 don't differ much.
The Audi A3 doesn't pale in comparison to the Pontiac Vibe when it comes to fuel economy.
In terms of MSRP, the Pontiac Vibe costs markedly less than the Audi A3.
Overview
The basic warranty that comes with the Vibe isn't quite as generous as the Audi A3's.