From The Airport Wiki

This is a lengthened, minimum change version of the A320. The wing area is slightly enlarged and the undercarriage is strengthened, and higher thrust variants of either the CFM56 or the V2500 are used. The A321's closest Boeing equivalents are the 737-900/-900ER and the 757-200, though the A321 lacks the transatlantic flight range and "hot and high" operation capabilities of the 757 due to less powerful engines. Type certification was awarded in December 1993 by the JAA. But with lower weights compared to the 757; as well as the lower fuel burn due to the optimised power [maximum of 33000LBS to the 757 43500lbs of thrust] of its engines it is effectively cheaper to operate; despite having less seating in maximum density.

Typical range with 186 passengers for the A321-100 is about 2,300 nautical miles (4,300 km). It is powered by two CFM56-5 or IAE V2500 engines with a thrust rating of 31,000 pounds force (138 kN).

The A321-200 has extra fuel capacity bringing the range with 186 passengers up to about 3,000 nautical miles (5,500 km). The A321-200 is powered by two CFM56-5 or IAE V2500 engines with a thrust rating of about 33,000 pounds force (147 kN).