Airbus A340-300 has 295 seats

Airbus A340-500 has 313 seats

Airbus A340-600 has 380 seats

The Airbus A340 has four engines.

The Airbus A340 is significantly larger and has 4 engines, the Airbus A340-600 series is 247 feet long.The Airbus A300 has two engines and is 177 feet long.

The Airbus A340 costs between $212m and $254 depending on configuration and variant;

A340-300: $212 - $219m

A340-500: $233 - $241m

A340-600: $245 - $254m

The Airbus A340 costs beween $212m and $254m (US Dollars) depending on variant and configuration.