The 1989-1993 Miata came with a 1.6L DOHC and made around 120 hp.
The 1994-1998 Miata came with a 1.8L DOHC and made around 131 hp.
The 1999-2005 Miata came with a (updated) 1.8L DOHC and made around 142 hp.
The 2006-present Miata came with a 2.0L DOHC and made around 170 hp.
The Mazda Miata MX-5 has improved greatly throughout the years. Older models only had around 98 horsepower, however, the newest models, as of 2012, has a rating of 238 horsepower.
The 1990 model of Miata came with a 1.6L DOHC engine and produced around 120 horsepower.
The 2008 Mazda MX-5-Miata's engine produces 166 hp @ 6700 rpm.
The 2013 Mazda MX-5-Miata's engine produces 167 hp @ 7000 rpm.
The 2002 Mazda MX-5-Miata's engine produces 142 hp @ 7000 rpm.
The 2014 Mazda MX-5-Miata's engine produces 167 hp @ 7000 rpm.
The 2003 Mazda MX-5-Miata's engine produces 142 hp @ 7000 rpm.
The 2011 Mazda MX-5-Miata's engine produces 167 hp @ 7000 rpm.
The 2010 Mazda MX-5-Miata's engine produces 167 hp @ 7000 rpm.
The 2004 Mazda MX-5-Miata's engine produces 142 hp @ 7000 rpm.
The 2009 Mazda MX-5-Miata's engine produces 167 hp @ 7000 rpm.
The 2007 Mazda MX-5-Miata's engine produces 166 hp @ 6700 rpm.