Two Honeywell TFE731-2-2B engines provide 3,500 pounds of thrust, allowing the Lear 35 to take off in 4,972 feet. Its maximum takeoff weight is pretty high as well at 18,300 pounds.
Components of these engines have been used on much higher-performing jets. Their pressure compressors were taken from the Garret 660-series engine, which is most notably used on 747s.
The Learjet 35 has a relatively long range for a private jet and can cruise at speeds as high as 451 ktas, or 424 ktas with four passengers. Fuel consumption is excellent: the 31A burns 197 gallons of fuel per hour.