SMRTR TechNov 6, 2025BGR

SpaceX's Raptor Engine Vs. Blue Origin's BE-4 - What's The Difference In These Rocket Engines

SMRTR summary

SpaceX's Raptor engine outperforms Blue Origin's BE-4 in most technical specifications, featuring higher chamber pressure (350 bar versus 134 bar), better fuel efficiency with 350-380 seconds specific impulse compared to BE-4's 340 seconds, and longer burn times during testing. However, BE-4 engines have successfully powered real orbital missions while Raptor engines remain largely theoretical despite their superior on-paper performance.

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