How much horsepower does a 91 Integra have?
The 1991 Acura Integra, fitted with the 1.8-liter B18A1 engine, produced about 140 horsepower in US-spec form, with roughly 127 lb-ft of torque. This figure is typically cited as SAE net horsepower for that model year.
Framed by the first-generation Integra lineup, this output reflects the common US market rating for the B18A1’s power. The engine was a non-VTEC 1.8L four-cylinder designed for smooth, practical performance rather than high horsepower peaks. While later variants would boost power significantly, the 1991 Integra established a reputation for agile handling and reliable daily driving with its around-140 hp figure.
Engine details and context
The 1991 Integra used Honda's B18A1 1.8-liter DOHC four-cylinder. It delivered approximately 140 hp at about 6,000–6,600 rpm and around 127 lb-ft of torque at roughly 5,000 rpm in US-market specifications. The engine did not feature Honda's VTEC technology in this generation, which kept power delivery more linear and predictable for everyday use.
Notes on variations and how it compares to later models
Power figures can vary slightly by market, emission calibrations, and testing methods. For context, later Integra variants—such as the GS-R and the performance-oriented Type R—used more powerful engines (for example, the GS-R's B18C1 with about 170 hp in the mid-1990s). The 1991 US-spec Integra, however, remained around 140 hp with non-VTEC architecture.
Summary
In summary, the 1991 Acura Integra's horsepower is typically cited as 140 hp (SAE net) for US-spec models, with torque near 127 lb-ft. This reflects the era's non-VTEC 1.8-liter engine and the model's emphasis on balanced handling and everyday usability rather than peak horsepower alone.
