MX-3.com

Generation 1.5
The MX-5 Miata was freshened for 1994 with the introduction of a more powerful 1.8 L BP engine, dual airbags, a geared, torque-sensing limited slip differential, and other options. The new engine produced 98 kW (130 hp) and the standard model weighed 990 kilograms (2183 lb). In some markets such as the UK the 1.6 engine continued to be available as a lower-cost option, but was detuned to only 88 bhp to make it less competitive with the 1.8. Later 1.8 engines were up in power to 133 bhp due to the use of a more sophisticated engine management system (OBD-II).

Generation 2
The BP-4W engine remained at 1.8 L 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. The new intake manifold received a set of flappers that could uncover a resonance chamber - this was needed to fix a dead spot in the torque curve that the new head created. Power output of the new engine is quoted at 105 kW (140 hp) with 119lbft of torque.

Generation 2.5
The 1.8 L BP-Z3 engine was slightly modified and now featured variable valve timing on the intake camshaft. The intake and exhaust system also received a minor upgrade. These modifications resulted in power output of 117 kW (155 bhp) for models delivered in Japan and Australia. The same engine produced 110 kW (146 hp) in vehicles sold in the United States and Europe (likely due to more restrictive emission standards). In the United States, Mazda erroneously quoted the power figure for the Japanese and Australian model in early catalogues. Car and Driver magazine and numerous owners confirmed the missing power, and Mazda was forced to buy back a number of 2001 cars due to these misleading power claims. Owners who did not take up the buy back offer were offered an apology and free servicing for the warranty period.

Mazdaspeed MX-5
2004 saw the introduction of the turbocharged Mazdaspeed MX-5. It featured a light-pressure turbo BPT engine for 178 hp rather than the S-VT BP-Z3. Other features included a special suspension, upgraded transmission and clutch assemblies, upgraded drivetrain components, Racing Hart 17 inch wheels, special interior trim, and special exterior paint.

Though not officially a "Limited Edition" production run, only a small number of Mazdaspeed Miatas were produced during model years 2004 and 2005. In 2004, 4000 cars where built and in 2005, 1428. Production numbers, VINs and build dates are here: http://mazda-speed.com/forum2/index.php?topic=933.0

hgallegos915 wrote:so the bpt doesnt even reach 200 hp?

Legato626 wrote:Wait i think they are going to call it RX-3! =)