The Boeing 707 boasted impressive technical specifications for its era. Powered typically by Pratt & Whitney JT3D turbofan engines, it had a cruising speed of 885 km/h (550 mph) and could carry around 140 to 189 passengers depending on cabin layout. Its maximum range spanned up to 9,300 kilometers (5,800 miles), enabling long-haul flights without frequent refueling stops.