A new, larger version of the existing A-Series engine had been developed in conjunction with cylinder head specialist Harry Weslake for the then new ADO16 Austin/Morris 1100 range. This new engine used a taller block than the 948 cc unit, with increased bore and stroke bringing total capacity up to 1,098 cc. Although fuel consumption suffered moderately at 38 mpg, the Minor's top speed increased to 77 mph (124 km/h), and a 20% increase in torque gave an altogether more responsive drive. The revised engine was teamed to a stronger gearbox fitted with baulk ring synchromesh replacing the previous cone-clutch type. Drum brakes were retained on each corner, but the front units were increased from 7 inches (18 cm) to 8 inches (20 cm) in diameter. From October 1963, larger combined front side/indicator light units, common to many BMC vehicles of the time, were fitted to the front wings, and larger tail lamp units were fitted at the rear. Both incorporated separate amber flashers for directional indicators. In 1964 the interior received its final update, with a new heater unit (now with fresh air ventilation), and from October of that year, a modified dashboard with toggle switches, white-on-black speedometer unit (incorporating a warning light for a blocked oil filter), textured alloy fascia, new glove-box cover design (a fully enclosing bottom-hinged cover on the passenger side, and fixed open aperture surround on the driver's side), and finally a two-spoke 'safety' steering wheel (shared with the Morris 1100) were added.