At faster speech rates, segments are generally expected to be produced shorter, but not every segment may be compressed to the same extent. In both German, and Hungarian we find phonologically distinctive vowel length contrast which is expressed using different combinations of durational and spectral cues. In fast speech, temporal reduction is also expected to be accompanied by some degree of spectral reduction due to target undershoot. As a result, increased speech rate is assumed to endanger the vowel length contrast in both the temporal and the spectral domains of speech. In the present study, we tested this hypothesis and explored whether contrast reduction manifests differently in the two typologically unrelated languages mentioned above. We analyzed the duration of vowels and the duration ratio, and spectral distance in the F1×F2 plane of the short-long vowel pairs produced by 15 Hungarian and 14 German speaking females. Results showed that, in general, both durational and spectral cues of the quantity contrast were preserved. Hence, the quantity contrast was maintained in fast speech in both languages, suggesting that neither durational nor spectral cues of the contrast may be considered redundant.