The Airbus A310 is larger than the Airbus A320 in terms of overall size, capacity, and range. Here's a comparison:
Type: Wide-body aircraft
Length: ~46.66 m (A310-300 variant)
Wingspan: 43.9 m
Passenger Capacity: 280–280 passengers (two-class configuration)
Range: ~9,540 km (A310-300)
Role: Medium- to long-haul
Type: Narrow-body aircraft
Length: ~37.57 m
Wingspan: 35.8 m (A320ceo) or 35.8–39.5 m (A320neo)
Passenger Capacity: ~140–244 passengers (depending on the variant and seating configuration)
Range: ~6,300 km (A320neo)
Role: Short- to medium-haul
The A310, being a wide-body aircraft, is larger and capable of carrying more passengers over longer distances.
The A320 is a smaller, more efficient aircraft optimized for shorter routes and is a popular choice for airlines in the single-aisle market.