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In 1998, Mazda released the second-generation MX-5, production code NB, for the 1999 model year. The NB featured a more powerful engine and external styling cues borrowed from the third generation Mazda RX-7 model. Prices in the United States, the main market for the MX-5, started at US$19,770 (US$26,700 in 2011 adjusted for inflation).
Although many parts of the interior and body were different, the most notable changes were the headlamps: the first generation's retractable headlamps no longer passed pedestrian safety tests and were replaced by fixed ones. The new car grew slightly in width compared to the earlier model; its dimensions were: length 3,945 mm (155.3 in), width 1,678 mm (66.1 in), height 1,228 mm (48.3 in) and wheelbase 2,265 mm (89.2 in). Without options, the NB weighed 1000 kg (2300 lb). The new generation was slightly more aerodynamic than the original, with a Cd figure of 0.36.
The NB continued to employ four-wheel independent suspension, with enlarged anti-roll bars at the front and rear, but the wheels, tires and brakes were significantly upgraded: anti-lock braking system was offered as an option; alloy wheels were now 14 in (360 mm) or 15 in (380 mm) in diameter and 6 in (150 mm) in width, depending on the trim package; sports models were equipped with the larger wheels and 195/50VR15 tires.
The BP-4W engine remained at 1.8 L (110 cu in) but received several minor updates. The engine compression ratio was raised from 9.0:1 to 9.5:1 by adding slightly domed pistons; the intake cam was changed to a solid lifter design with a stronger cam; the intake runners in the head were straightened and the intake manifold was mounted higher up. Mazda's Variable Intake Control System was introduced, which effectively gave a long narrow intake manifold at low rpm for better swirl, changing to a short, free-flowing manifold at high rpm for maximum breathing. Power output of the new engine was quoted at 104.4 kW (140.0 bhp) with 116 lbf·ft (157 N·m) of torque.
The 1.6 L (98 cu in) B6 engine remained available in Europe and Japan. The base-model 1.8 L (110 cu in) NB could reach 62 mph (100 km/h) in 7.8 s and had a top speed of 130 mph (210 km/h).
Read more about this topic: Mazda MX-5
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